Zte Bts Manual
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ZXG10-BTS (V1A) Base Transceiver Station
Maintenance Manual
ZTE Corporation
© ZTE Corporation. 2002, Shenzhen, P. R. China
All rights reserved. No part of this publication may be excerpted, reproduced, translated, annotated or edited, in any form or by any means, without the prior written permission of the copyright owner.
ZXG10-BTS (V1A)
Maintenance Manual *
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3/F., A Wing, ZTE Plaza, Hi-Tech Industrial Park, Shenzhen, P. R. China Tel: (0086) 755–26790192 Fax: (0086) 755–26790160 Post-code: 518057 *
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August, 2002 First Edition, First Print
Preface ZXG10, a GSM mobile communication system independently developed by ZTE Corporation, is composed of the switching sub-system ZXG10-MSS and the base station sub-system ZXG10-BSS. The ZXG10-BSS is in charge of providing and managing wireless transmission in GSM, and is composed of the base station controller ZXG10-BSC and the base station transceiver ZXG10-BTS, etc. The reliable running of the ZXG10-BSS on the network is closely related to correct operation and maintenance. Therefore, it is very important to handle problems properly with correct methods. The ZXG10-BTS (V1A) Maintenance Manual serves as a guide for the user to perform daily maintenance and fault handling on ZXG10-BTS (V1A). This manual primarily introduces the daily maintenance, alarm handling and operation information processing of ZXG10-BTS (V1A). In this Manual, ZXG10-BTS (V1A) is abbreviated as BTS (V1A) or BTS; ZXG10-BTS (V1A) local management terminal as LMT; ZXG10-BSS (V1A) as BSS; and ZXG10-BSC (V1A) as BSC (V1A) or BSC. This Manual includes three chapters: Chapter 1 introduces the routine maintenance and emergent maintenance of the ZXG10-BTS (V1A) as well as frequently used maintenance methods. Chapter 2 introduces the alarm classification of the LMT of ZXG10-BTS (V1A) and describes in detail the alarm code, alarm content, alarm level, alarm cause, alarm impact, time limit of handling, and handling process. Chapter 3 itemizes the operation information and handling methods of the boards such as OMU and TRU. Appendix A introduces the procedures and precautions for replacing parts and boards. Appendix B gives a list of abbreviations used in this document for the convenience of users in reading this Manual. This set of manuals also consists of the following documents: Technical Manual for ZXG10-BTS (V1A) Installation Manual for ZXG10-BTS (V1A) Operation Manual for ZXG10-BTS (V1A) Statement: The actual product may differ from what is described in this manual due to frequent updates of ZTE products and fast development of technologies. Please contact our local office for updating/upgrading information of the product.
Contents 1 EQUIPMENT MAINTENANCE..........................................................................................................1 1.1 MAINTENANCE DESCRIPTION.......................................................................................................................1 1.2 ROUTINE MAINTENANCE.............................................................................................................................2 1.2.1 Daily routine maintenance...........................................................................................................2 1.2.2 Regular routine maintenance.......................................................................................................4 1.3 EMERGENT MAINTENANCE..........................................................................................................................5 1.4 TYPICAL MAINTENANCE METHODS...............................................................................................................6 1.5 RELEVANT MAINTENANCE TABLES................................................................................................................7 1.5.1 Routine maintenance and operation record table .......................................................................7 1.5.2 Emergent maintenance and operation record table ..................................................................10 2 ALARM HANDLING...........................................................................................................................11 2.1 ALARM INFORMATION AND CLASSIFICATION.................................................................................................11 2.2 LEVEL-1 ALARM....................................................................................................................................18 2.3 LEVEL- 2 ALARM...................................................................................................................................18 2.3.1 Alarm of the main clock signal of the BS CKU .........................................................................18 2.3.2 Software version error of the BIE..............................................................................................19 2.3.3 Major alarm of the standing wave ratio of the transmitter combiner .......................................19 2.3.4 Communication interruption of the OMU..................................................................................20 2.4 LEVEL- 3 ALARM...................................................................................................................................21 2.4.1 Check error of the uplink data from the receiving processor to the channel processor............21 2.4.2 Frame unit fault..........................................................................................................................24 2.4.3 Inconsistency of software versions.............................................................................................27 2.4.4 Out-of-lock of the transmitting RF self oscillator......................................................................28 2.4.5 Error of software versions..........................................................................................................29 2.4.6 Fault of the BS clock unit (CKU)...............................................................................................31 2.4.7 Fault of BIE switching chips......................................................................................................33 2.4.8 Faults of the BIE E1 interface....................................................................................................35 2.4.9 Alarm of fans of the BIE.............................................................................................................41 2.4.10 Alarm of temperature sensor ...................................................................................................47 2.4.11 Fault of buses...........................................................................................................................52 2.4.12 Alarm of power amplifiers (PAs)..............................................................................................53 2.4.13 Alarm of low-noise amplifiers of the receiver multi-coupler ..................................................55
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2.4.14 Power alarm.............................................................................................................................57 2.4.15 Interruption of board communications....................................................................................58 2.4.16 Timeout of board unreported....................................................................................................61 2.4.17 Alarm of the 80W power amplifier (PA)...................................................................................62 2.4.18 Other alarm information..........................................................................................................63 2.5 LEVEL 4 ALARM .....................................................................................................................................67 2.5.1 Digital processor fault in the transceiver..................................................................................67 2.5.2 Check error of the uplink data from the RPP to the CHP..........................................................72 2.5.3 Cross-threshold of the flash memory programming times in the frame unit controller.............75 2.5.4 Channel parameter configuration error....................................................................................75 2.5.5 Out-of-lock of receiving RF self oscillator.................................................................................79 2.5.6 Alarm for out-of-lock of the phase-locked loop of the BS CKU.................................................80 2.5.7 No response of layer-3 software.................................................................................................81 2.5.8 Slide code indication of the BIE E1 interface signal.................................................................83 2.5.9 BS OMU fault.............................................................................................................................88 2.5.10 Minor alarm of PA over-temperature.......................................................................................89 2.5.11 Board communication interruption..........................................................................................90 2.5.12 Boards are unreported till timeout..........................................................................................94 2.5.13 80W PA link alarm..................................................................................................................101 3 RUNNING INFORMATION PROCESSING..................................................................................102 3.1 CLASSIFICATION OF RUNNING INFORMATION...............................................................................................102 3.2 OMU OPERATION INFORMATION.............................................................................................................106 3.2.1 OMU board not powered on.....................................................................................................106 3.2.2 OMU board powered on...........................................................................................................106 3.2.3 OMU BOOT starting................................................................................................................106 3.2.4 OMU in active status................................................................................................................107 3.2.5 OMU in standby status.............................................................................................................107 3.2.6 OMU procedure initially launched..........................................................................................107 3.2.7 OMU clock fault.......................................................................................................................108 3.2.8 OMU LAPD link disconnected.................................................................................................108 3.2.9 OMU system in the initialization status ..................................................................................108 3.2.10 OMU file downloading...........................................................................................................109 3.3 TRU OPERATION INFORMATION...............................................................................................................109 3.3.1 TRU board not powered on......................................................................................................109 3.3.2 TRU board powered on............................................................................................................109 3.3.3 BOOT starting..........................................................................................................................110
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3.3.4 Process initially started............................................................................................................110 3.3.5 OMU clock fault.......................................................................................................................110 3.3.6 LAPD link disconnected...........................................................................................................111 3.3.7 TRU HDLC link disconnected..................................................................................................111 3.3.8 TRU system in the initialization status.....................................................................................112 3.3.9 TRU file downloading...............................................................................................................112 3.3.10 TRU BCCH carrier indication...............................................................................................112 3.4 BIE RUNNING INFORMATION...................................................................................................................113 3.4.1 BIE board not powered on........................................................................................................113 3.4.2 BIE program out of service......................................................................................................113 3.4.3 BIE HDLC link not established................................................................................................113 3.4.4 BIE working normally..............................................................................................................114 3.4.5 BIE in the active status.............................................................................................................114 3.5 EBIE RUNNING INFORMATION................................................................................................................114 3.5.1 EBIE board not powered on.....................................................................................................114 3.5.2 EBIE program out of service....................................................................................................115 3.5.3 EBIE 8K and E1 alarm.............................................................................................................115 3.5.4 EBIE HDLC link not established..............................................................................................115 3.5.5 EBIE working normally............................................................................................................116 3.5.6 EBIE in active status................................................................................................................116 3.5.7 EBIE parameter configuration ................................................................................................116 3.6 CKU RUNNING INFORMATION.................................................................................................................117 3.6.1 CKU board not powered on......................................................................................................117 3.6.2 CKU initialization....................................................................................................................117 3.6.3 CKU program out of service....................................................................................................117 3.6.4 CKU working normally............................................................................................................118 3.6.5 CKU in the active status...........................................................................................................118 3.6.6 CKU in the phase lock status....................................................................................................118 3.6.7 CKU in the locked status..........................................................................................................118 3.6.8 Asynchronization of the whole CKU network ..........................................................................119 3.6.9 The CKU clock frame number abnormal.................................................................................119 3.6.10 CKU HDLC link not established............................................................................................119 3.6.11 The CKU 8K clock abnormal.................................................................................................120 3.7 EAM RUNNING INFORMATION................................................................................................................120 3.7.1 EAM board not powered on.....................................................................................................120 3.7.2 EAM initialization....................................................................................................................120 3.7.3 EAM working normally............................................................................................................121
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3.7.4 EAM HDLC link disconnected.................................................................................................121 3.7.5 The EAM system clock severely abnormal...............................................................................121 APPENDIX A REPLACEMENT OF BOARDS AND PARTS..........................................................123 A.1 OVERVIEW........................................................................................................................................123 A.2 REPLACEMENT OF THE PUBLIC SHELF BOARD..........................................................................................124 A.3 REPLACEMENT OF THE CARRIER SHELF BOARD........................................................................................125 APPENDIX B ABBREVIATIONS.......................................................................................................127
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1 Equipment Maintenance 1.1Maintenance description The objective of daily maintenance is to ensure an optimized working condition of the product, so that the whole network runs properly. The classification of the daily maintenance of the ZXG10-BTS (V1A), together with the maintenance requirements and recommendations will be described below. 1. Maintenance classification Daily maintenance of ZXG10-BTS (V1A) can be classified into routine maintenance and emergent maintenance. The routine maintenance refers to periodical maintenance, which is divided into daily routine maintenance and regular routine maintenance by their maintenance periods. Emergent maintenance refers to the maintenance tasks to be immediately executed as required by sudden failures of the ZXG10-BTS (V1A) equipment and network adjustment, e.g., equipment failure, user-reported fault, and the emergent problems found out in routine maintenance. Emergent failures are characterized by abrupt occurrence and serious influences on the QoS, so the maintenance personnel in the equipment room are required to handle them decisively, cautiously and in-time. A detailed record must be made afterward so as to eliminate potential faults. 2. Maintenance requirements and recommendations The daily maintenance of ZXG10-BTS (V1A) equipment is a major task for the maintenance personnel in the equipment room. Excellent daily maintenance is a key factor to ensure long-term stable running of the equipment. Therefore, a set of equipment room maintenance regulations should be formulated to regulate and guide the work of the maintenance personnel. The followings are some basic requirements and recommendations for daily maintenance: 1) The maintenance personnel should implement the daily and regular routine check strictly and keep a detailed record without any omission. 2) The maintenance personnel must keep the equipment room safe and tidy, with proper temperature and humidity. 3) The maintenance personnel should follow the equipment operation specifications strictly,
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Maintenance Manual for ZXG10-BTS (V1A)
avoid any operations on the equipment beyond the daily maintenance specifications, e.g., arbitrarily plugging/unplugging, resetting, starting and switching over the equipment, or changing the data; and should wear an anti-static wrist strap when accessing the hardware system, and store the damaged parts and the spare parts in anti-static bags, which should be labeled of the category and stored properly. 4) The person in charge of the equipment room should keep the user accounts, passwords and the user authorities for login to the local operation & maintenance console and to the network management system, and distribute them to relevant persons according to their specific authorities, so as to define the responsibility and authority clearly. 5) The maintenance personnel should handle detected problems and faults in time, report major problems to relevant supervisors in time and contact the local office of ZTE to get an early solution, which should be recorded in detail afterward. 6) Before on-duty, the maintenance personnel must undergo necessary training. Different maintenance positions should be assumed by persons of the corresponding technical levels. 7) The frequently used tools and instruments should be checked, repaired and calibrated before use to ensure their proper conditions. Generally, the following tools and instruments are recommended to be prepared in the equipment room. A. Tools and auxiliary materials: screwdriver (flat-head and Phillips), diagonal pliers, cable stripper, unpacking pliers, electric iron, chip-extractor, programmer, eraser, tweezers, spanner, electrical drill, tape, anti-static wrist strap, insulating tape and cable tie. B. Instruments: Multimeter, thermometer, humidity meter, optical power meter and earth resistance tester. 8) The power supply of the system should be kept stable and reliable, and the grounding of the system should be checked regularly.
1.2Routine maintenance 1.2.1Daily routine maintenance Daily routine maintenance includes the following items: 1. Equipment room environment 1) Temperature requirements:
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Chapter 1 Equipment MaintenanceAlarm Handling
Ambient temperature requirements: -5˚C ~ +45˚C; recommended to be always kept between 15˚C ~ 30˚C. A thermometer should be available in the equipment room, and the maintenance personnel should check it daily and make a record in detail; an air conditioner is recommended to be installed in the equipment room to meet the temperature requirements for long-term stable running of the equipment. 2) Humidity requirement Relative humidity requirement: 15%~85%; recommended to be kept at 40%~65%. A humidity meter should be available in the equipment room, and the maintenance personnel should check it daily and keep a record in detail. A humidity conditioning device is recommended to be installed in the areas where the humidity is seriously improper, especially, a damp-proof device is recommended in areas of high humidity and anti-static floor is recommended in areas of low humidity. 3) Working status of the air conditioner Check whether the air conditioner (or other humidity conditioning devices) can work normally according to the preset temperature (humidity) requirements, and handle the faults in time if any. 4) Dust-proof During the daily maintenance, the equipment should be kept free from dust or contamination. It is recommended to apply dust-proof sealing rubber strips around the windows and doors of the equipment room, adopt double-layered-glass sealed windows and wear union suits and special shoes in the equipment room to diminish dust. In addition, strong magnetic, electrical or corrosive materials should not be present inside or around the equipment room so as to prevent from harmful particles. 2. Equipment running status 1) Querying the alarm information Check the site alarms and rack alarms in the alarm query window of the operation & maintenance center (OMCR) of the BSS or the LMT of the BTS, keep a detailed record of the alarm information, and contact the technical personnel in time to locate and eliminate faults. A. In the OMCR of the BSS, the current alarms are displayed in real time, and the rack diagram and the alarm statuses of boards are displayed dynamically in the main interface
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Maintenance Manual for ZXG10-BTS (V1A)
of alarms. The recovered history alarms, current alarms and ordinary notifications can be queried as needed. For the procedure of querying alarms, please see ZXG10-BSS (V1A) Operation Manual; for the alarm causes and handling process, please see ZXG10-BSS (V1A) Maintenance Manual. B. Whether the Abis link is connected through or not, the LMT system of the BTS permits the maintenance personnel to query the alarm status of boards in the site, including alarm mode, alarm location, alarm content, fan running condition and rack temperature. Multiple alarms may exist on the same board at a time, and the board color on the alarm viewing interface represents the top alarm level existing on this board. Click the board, and all alarm information on this board will be displayed. For the procedure of querying alarms, please see ZXG10-BTS (V1A) Operation Manual; for alarm causes and handling process, please see Chapter 2 of this Manual. 2) Running status of boards Check whether the indication of the indicators for each board in the rack is normal. If any alarm indicator is on, contact the technical personnel in time to locate and eliminate the fault. The running information of the ZXG10-BTS (V1A) mainly comes from the indicators on the panels of modules such as OMU and TRU. By the different flashing meanings of the indicators, you can determine the running status of the equipment basically. For the meanings, causes and handling of various indicator statuses, please see Section 3.1 of this Manual.
1.2.2Regular routine maintenance Regular routine maintenance includes the following items: 1. Checking the BTS modules Check the amount, model and version of spare modules once a week, and make sure that the spare modules are stored in compliance with the requirements, with adequate amount and the convenience to find. Check the back-to-fix conditions of faulty modules once a week. 2. Hardware checking: once a month. 1) Cleaning the rack Clean the surface of the cabinet, clean and dry the air filter at the bottom of the cabinet; check whether the cabinet is rusted, and whether there is any unrelated article in the cabinet. Report any difficult problems in time if any, so as to get an early repair. -4-
Chapter 1 Equipment MaintenanceAlarm Handling
2) Checking the connection of power cables Check whether the power cables are connected tightly, and whether there is rust. 3) Checking the connection of grounding cables Check whether the grounding cables are connected tightly, and whether there is rust. 4) Checking the power modules Check whether the power supply of each shelf can work independently. Contact the technical personnel in time for any problem so as to fix the problem. 3. Transmission Check the connector tightness of the transmission cables from the optical terminal/microwave rack to the BTS rack once every quarter, and keep the transmission cables free from twisting, pressing, deforming and over-tightness; and test the spare ports. 4. Antenna and feeder system Adjust and calibrate the direction and pitch angle of the antenna once half a year; tighten the antenna, outdoor jumper, feeder cable and indoor jumper; apply rust-proof treatment to the antenna pole, feeder cable rack and grounding bar which are subject to getting rusty; test the VSWR of the antenna and feeder system, the transmitting power of the PA; and perform a general test on all frequencies of all cells of each BS.
1.3Emergent maintenance Emergent maintenance refers to the maintenance task which needs to be handled immediately in response to the emergent fault of ZXG10-BTS (V1A) equipment. Emergent faults are characterized by abrupt occurrence and serious influence on the QoS, so the maintenance personnel of the equipment room are required to handle them decisively, cautiously and in-time. A detailed record should be made afterward so as to eliminate potential faults. Generally, the emergent handling process and measures for emergent faults can be summarized based on the following two types of faults: 1. Emergent faults and disasters in the environment of the equipment room 1) Major faults: Fault of the power supply system; floods, fires; faults of the air conditioner system which cause the temperature and humidity severely beyond the specifications. -5-
Maintenance Manual for ZXG10-BTS (V1A)
2) Maintenance measures: When any alarm information is observed from the OMCR of the BSS or the LMT system of the BTS, perform an immediate inspection on the environment of the equipment room, locate the fault cause, and eliminate the fault quickly. Afterward, report to the superior leaders and keep a detailed record to eliminate potential faults. 2. Emergent fault of the equipment 1) Major faults: including hardware faults, e.g., damage of boards and modules, not-in-position, poor contact, and software faults, e.g., disorder of data and program, and improper upgrading. 2) Maintenance measures: A. Through plugging/unplugging, some faults such as not-in-position and poor contact of the hardware system can be solved; through the replacing or isolation method, the faults such as hardware damage can be located; the data disorder can be queried and corrected through operations in the OMCR of the BSS or the LMT system of the BTS. B. Faults of the software and hardware are numerous and complicated. If the above simple methods fail to solve the problem, please contact the technical personnel or the regional office of ZTE Corporation, report to the relevant leaders, and keep a detailed record afterward so as to eliminate potential faults.
1.4Typical maintenance methods In daily maintenance, several typical maintenance methods can be used as follows: 1. Observation method Locating the fault by viewing the alarm information of the LMT of the BTS. The observation method is the first method the maintenance personnel should use in case of fault occurrence. Making a correct judgement on the observation result is a key step for correct analysis and handling of the fault. Therefore, the maintenance personnel must be very familiar with the indicator statuses of the boards, and fully aware of the meanings of the alarm information of different levels on the LMT of the BTS. 2. Plugging/unplugging method When a circuit board is initially found faulty, plug/unplug the circuit board and the external interface connector to eliminate such faults as poor contact or processor abnormality. Make sure that the board must be hot-swappable when this method is applied.
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Chapter 1 Equipment MaintenanceAlarm Handling
3. Replacing method The replacing method is to check the fault by replacing the circuit board in question with a normal circuit board. When the plugging/unplugging method fails, the replacing method can be applied. When plugging/unplugging and replacing the board, please see the precautions and operation procedure for replacing the boards and parts as listed in Appendix A. 4. Isolation method When a part of the system is faulty, the involved circuit board or racks can be isolated to check whether the fault comes from mutual impact. For example, a typical application of the isolation method is to self-loop the I/O interface of a circuit board so as to isolate and solve the problem of the related system. 5. Self-test method When the system or circuit board is powered on again judge if there is any fault by way of self-test. Usually, when a circuit board is re-powered on for self-test, the indicators on its panel will flash regularly, so that we can check whether the circuit board itself is faulty. 6. Pressing method Such faults as poor contact can be removed by pressing the chips and cable connectors. 7. Comprehensive method Any fault can be cleared by combining the above methods and taking advantage of one’s maintenance experience.
1.5Relevant maintenance tables 1.5.1Routine maintenance and operation record table The daily maintenance record table is shown in Table 1-1. The regular maintenance table is shown in Table 1-2. The maintenance item periodical summary table is shown in Table 1-3.
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Maintenance Manual for ZXG10-BTS (V1A)
Table 1-1 Daily maintenance record table Items
Operation item
Equipment running status and
Operator
Remarks
Operator
Remarks
handling result Temperature Equipment
Humidity
room
Working status of
environment
the air conditioner Dust-proof
Equipment
Querying the alarm
running status
information Running status of boards
Table 1-2 Regular maintenance record table Items
Operation item
Equipment running status and handling result
Check the
Check the BTS
BTS module
module Clean the rack Check the connection of power
Hardware: check
cables Check the connection of grounding cables Check the power module
Transmission
Transmission
Antenna and
Antenna and feeder
feeder
system
System
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Chapter 1 Equipment MaintenanceAlarm Handling
Table 1-3 Maintenance item periodical summary table Items
Operation item
Maintenance period
Equipment room environment
Temperature
Daily
Humidity
Daily
Working status of
Daily
Equipment running status Operator
Remarks
and handling result
the air conditioner Dust-proof
Daily
Equipment
Querying the
Daily
running status
alarm information Running status of
Daily
boards BTS module check
Check the BTS
Weekly
module Clean the racks
Monthly
Check the
Monthly
connection of Hardware: check
power cables Check the
Monthly
connection of ground cables Check the power
Monthly
module Transmission
Transmission
quarterly
Antenna and
Antenna and
Half a year
feeder
feeder system
System
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Maintenance Manual for ZXG10-BTS (V1A)
1.5.2Emergent maintenance and operation record table The emergent fault handling record table is shown in Table 1-4. Table 1-4 Emergent fault handling record table Exchange name:
Person to handle:
Time
Time of fault resolved:
Fault source: ٱinformed by the user ٱalarm system ٱfound in daily routine maintenance ٱ others Fault category: Fault description:
Handling method:
Result:
Remarks by the person in charge:
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2 Alarm Handling 2.1Alarm information and classification The alarm management of the LTM system is an important part of BTS local operation and maintenance. The LMT system, after it is put into operation, can perform centralized monitoring on the overall running condition of the BTS for the purpose of real-time maintenance and recovery. Whether the Abis link is connected through or not, the LMT system permits the maintenance personnel to query the alarm status of boards in the site, and view the site alarms and rack alarm information on the LMT alarm viewing interface. Boards that may send alarms include: 1. Boards in the public shelf: operation and maintenance unit (OMU), BS interface equipment (BIE), clock unit (CKU), external alarm collection module (EAM), signaling distribution unit (SDU) and power supply (PSA). 2. Boards in the carrier shelf: frame unit (FU), carrier unit (CU), power supply (PSB), power amplifier (PA), combiner HYCOM and multi-coupler MUL. 3. Others: fan, temperature. In terms of real-time handling, the alarms include ordinary notifications and alarms. Ordinary notifications only indicate unrepeatable or transient faults during the system running. Usually, if a notification is not frequently repeated, it may be caused accidentally by the environment, which needs no handling; if a notification is frequently repeated, or even the alarm occurs for a long time, it must be checked and solved in time. An alarm usually lasts for a certain time. According to the severity in the system, alarms are divided into four levels. Following is the division of the four alarm levels, as shown in Table 2-1.
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Maintenance Manual for ZXG10-BTS (V1A) Table 2-1 Division of alarm levels The scope of
The scope of
The scope of
The scope of system
services seriously
equipment safety
running reliability
affected
seriously affected
seriously affected
1
The whole BSS
The whole BSS
2
One or some sites
BSC or a site
The whole BSS
The whole BSS
3
One or some carriers
One or some carriers
BSC or a site
BSC or a site
4
One or some
No influence
One or some carriers
One or some
Alarm level
channels
system maintainability seriously affected
carriers
Note: In the definition of the alarm levels, the affected scope only refers to one single index. That is, if the affected scope of one single index, e.g., reliability, security reaches the specified scope, the level of the alarm can be determined basically. If one alarm item has affected several indexes, the alarm level should be raised. The alarm information summary table of the LMT is shown in Table 2-2. For the detailed information of the alarm, e.g., alarm cause, time limit of handling, handling process, please see relevant contents of Section 2.2~2.5. Table 2-2 Alarm information summary table Alarm code
Alarm name
Alarm level
0xC00
Alarm of the main clock signal of the BS CKU
2
0xD00
Software version error of the BS interface equipment
2
0x1301
Major alarm of standing wave ratio of the transmitter
2
combiner 0x1701
Communication interruption of the OMU.
2
0xA08
Data check error of both the main-set and sub-set uplink
3
data from the receiving processor to the channel processor (DSP0). 0xA09
Data check error of both the main-set and sub-set uplink data from the receiving processor to the channel processor (DSP1).
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Chapter 2 Alarm Handling
(continued) Alarm code
Alarm name
Alarm level
0xA0A
Data check error of both the main-set and sub-set uplink
3
data from the receiving processor to the channel processor (DSP2). 0xA0B
Data check error of both the main-set and sub-set uplink
3
data from the receiving processor to the channel processor (DSP3). 0xA0D
Fault of the interface clock between the frame unit
3
controller and the BS CKU. 0xA0E
Read/write error of the flash memory in the frame unit
3
0xA18
Overflow of the “watchdog” in the frame unit controller
3
0xA26
LAPD link disconnection of the frame unit controller and
3
the BSC 0xB00
Downlink check error between the frame unit and carrier
3
unit 0xA23
Inconsistency of the channel processor (CHP) software
3
version 0xA24
Inconsistency of the frame unit controller (FUC) software
3
version 0xB04
Out-of-lock of transmitting RF self oscillator 3
3
0xB05
Out-of-lock of transmitting RF self oscillator 4
3
0xB06
Out-of-lock of transmitting intermediate frequency self
3
oscillator 5 0xB0F
Wrong carrier unit (CU) software version
3
0xC0C
Wrong BS CKU software version
3
0xF2A
Wrong BS environment alarm board layer-3 software
3
version 0xC01
Alarm of BS CKU frame numbers
3
0xC09
Error of the BS CKU parameter configuration
3
0xC0A
Abnormality of the 8K clock signal between BS interface
3
equipment (BIE) and the BS CKU 0xD01
Fault of the BIE switching chip 1
3
0xD02
Fault of the BIE switching chip 2
3
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Maintenance Manual for ZXG10-BTS (V1A)
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Alarm code
Alarm name
Alarm level
0xD03
Fault of the BIE switching chip 3
3
0xD04
Fault of the BIE switching chip 4
3
0xD05
Read/write fault of E1 interface chip 1 of the BIE
3
0xD06
Read/write fault of E1 interface chip 2 of the BIE
3
0xD07
Read/write fault of E1 interface chip 3 of the BIE
3
0xD08
Loss of E1 interface signal 1 of the BIE
3
0xD09
Loss of E1 interface signal 2 of the BIE
3
0xD0A
Loss of E1 interface signal 3 of the BIE
3
0xD11
Alarm of out-of-frame of E1 interface signal 1 of the BIE
3
0xD12
Alarm of out-of-frame of E1 interface signal 2 of the BIE
3
0xD13
Alarm of out-of-frame of E1 interface signal 3 of the BIE
3
0xF01
Alarm of fan 1
3
0xF02
Alarm of fan 2
3
0xF03
Alarm of fan 3
3
0xF04
Alarm of fan 4
3
0xF05
Alarm of fan 5
3
0xF06
Alarm of fan 6
3
0xF07
Alarm of fan 7
3
0xF08
Alarm of fan 8
3
0xF09
Alarm of fan 9
3
0xF0D
Alarm of temperature sensor 1
3
0xF0E
Alarm of temperature sensor 2
3
0xF0F
Alarm of temperature sensor 3
3
0xF10
Alarm of temperature sensor 4
3
0xF11
Alarm of temperature sensor 5
3
0xF12
Alarm of temperature sensor 6
3
0x1002
Fault of the frame unit bus
3
0x1003
Fault of the low-speed bus
3
Chapter 2 Alarm Handling Alarm code
Alarm name
Alarm level
0x1100
Alarm of the PA output power
3
0x1101
Alarm of the PA voltage standing wave ratio
3
0x1102
Alarm of the PA tube over-current
3
0x1103
Alarm of PA tube over-voltage
3
0x1105
Major alarm of PA over-temperature
3
0x1200
Alarm of low-noise amplifier 1 of the receiver multi-
3
coupler 0x1201
Alarm of low-noise amplifier 2 of the receiver multi-
3
coupler 0x1400
Alarm of the power supply of the carrier shelf
3
0x1500
Alarm of the power supply of the public shelf
3
0x1702
Communication interruption of the BS interface board
3
0x1703
Communication interruption of the BS CKU
3
0x1704
Communication interruption of the BS environment
3
alarm unit 0x1708
Communication link disconnection of the power board of
3
the public shelf 0x1801
BS OMU unreported till timeout
3
0x1804
BS environment alarm board unreported till timeout
3
0x1106
Alarm of the current, voltage and temperature of the 80W
3
PA 0x1107
Alarm of the consistency of the two 80W PAs in terms of
3
the forward power and type, and the standing wave ratio of the PA on the left 0xA22
Inconsistent configuration of cell parameters
3
0xB08
Error of parameter configuration of the carrier unit
3
0xD14
Error of link parameter configuration of the BIE
3
0xF2B
No response of the layer-3 software of the BS
3
environment alarm board 0x1300
Minor alarm of standing wave ratio of the transmitter
3
combiner
(contiued)
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Maintenance Manual for ZXG10-BTS (V1A) Alarm code
Alarm name
Alarm level
0xA04
Initialization failure of the digital processor 0 in the
4
transceiver 0xA05
Initialization failure of digital processor 01 in the
4
transceiver 0xA06
Initialization failure of digital processor 02 in the
4
transceiver 0xA07
Initialization failure of digital processor 03 in the
4
transceiver 0xA10
Software overflow of digital processing unit 0 in the
4
transceiver 0xA11
Software overflow of digital processing unit 1 in the
4
transceiver 0xA12
Software overflow of digital processing unit 2 in the
4
transceiver 0xA13
Software overflow of digital processing unit 3 in the
4
transceiver 0xA14
Check error of one channel of the uplink data from the
4
RPP to the CHP (DSP0) 0xA15
Check error of one channel of the uplink data from the
4
RPP to the CHP (DSP1) 0xA16
Check error of one channel of the uplink data from the
4
RPP to the CHP (DSP2) 0xA17
Check error of one channel of the uplink data from the
4
RPP to the CHP (DSP3) 0xA19
Cross-threshold of the flash memory programming times
4
in the frame unit controller 0xA1A
Channel 0 parameter configuration error
4
0xA1B
Channel 1 parameter configuration error
4
0xA1C
Channel 2 parameter configuration error
4
0xA1D
Channel 3 parameter configuration error
4
0xA1E
Channel 4 parameter configuration error
4
0xA1F
Channel 5 parameter configuration error
4
Alarm code
Alarm name
Alarm level
(continued)
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Chapter 2 Alarm Handling
0xA20
Channel 6 parameter configuration error
4
0xA21
Channel 7 parameter configuration error
4
0xB02
Out-of-lock of receiving RF self oscillator 1
4
0xB03
Out-of-lock of receiving RF self oscillator 2
4
0xB07
Out-of-lock of receiving IF self oscillator 6
4
0xC08
Alarm for out-of-lock of phase-locked loop of the BS
4
CKU 0xC0D
No response of layer-3 software of the BS CKU
4
0xD15
No response of the layer-3 software of the BS BIE
4
0xB10
No response of the layer-3 software of the carrier unit
4
(CU) 0xD0B
Forward slide code indication of the BIE E1 interface
4
signal 1 0xD0C
Forward slide code indication of the BIE E1 interface
4
signal 2 0xD0D
Forward slide code indication of the BIE E1 interface
4
signal 3 0xD0E
Backward slide code indication of the BIE E1 interface
4
signal 1 0xD0F
Backward slide code indication of the BIE E1 interface
4
signal 2 0xD10
Backward slide code indication of the BIE E1 interface
4
signal 3 0x1000
Cross-threshold of the flash memory programming times
4
of the BS OMU 0x1001
Failure of flash memory programming of the BS OMU
4
0x1004
The standby board of the BS OMU not in position
4
0x1104
Minor alarm of PA over-temperature
4
0x1705
Communication interruption of the frame unit
4
0x1706
Communication link disconnection of the carrier unit
4
(continued)
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Maintenance Manual for ZXG10-BTS (V1A) Alarm code
Alarm name
Alarm level
0x1709
Communication link disconnection of the power board of
4
the carrier shelf 0x170A
Communication link disconnection of the PA
4
0x170B
Communication link disconnection of the multi-coupler
4
0x170D
Communication link disconnection of the combiner
4
0x1802
The BS interface board unreported till timeout
4
0x1803
The BS CKU unreported till timeout
4
0x1805
The frame unit unreported till timeout
4
0x1806
The carrier unit unreported till timeout
4
0x1808
The public shelf power board unreported till timeout
4
0x1809
The carrier shelf power board unreported till timeout
4
0x180A
The PA unreported till timeout
4
0x180B
The multi-coupler unreported till timeout
4
0x180D
The hybrid combiner unreported till timeout
4
0x1108
80W PA link alarm
4
2.2Level-1 alarm None.
2.3Level- 2 alarm 2.3.1Alarm of the main clock signal of the BS CKU Alarm code: 0xC00 Alarm content: Alarm of CKU main clock signal Alarm level: 2 Alarm cause: hardware fault Influence of the alarm: If the alarm occurs to an active CKU, this BS will fail to work normally; if the alarm occurs to a standby CKU, the running reliability of the system will deteriorate. Time limit of handling: Handle it at once.
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Chapter 2 Alarm Handling
Handling process: Replace the CKU board Alarm type: Equipment alarm
2.3.2Software version error of the BIE Alarm code: 0xD00 Alarm content: BIE (software version error)Alarm level: 2 Alarm cause: software version error, or wrong alarm caused by communication error Influence of the alarm: The system fails to start normally. Time limit of handling: Handle it at once. Handling process: 1. Insert the board properly and reset it. 2. If the alarm still exists, the board may be faulty, please replace the board. 3. If the alarm still exists, the board software version may be inconsistent with the OMU background database. Please contact the regional office of ZTE Corporation. Alarm type: Wrong handling.
2.3.3Major alarm of the standing wave ratio of the transmitter combiner Alarm code: 0x1301 Alarm content: Major alarm of the standing wave ratio of the transmitter combiner Alarm level: 2 Alarm cause: The external terminal of the combiner is open-circuited or of high resistance, the EAM receives interference signals or the EAM alarm line is wrongly connected. Influence of the alarm: The PA transmitting power is off protectively, and the corresponding cell fails to work. Time limit of handling: Handle it at once. Handling process: -19-
Maintenance Manual for ZXG10-BTS (V1A)
1. Check whether the EAM works normally. 2. Check whether the EAM alarm cable of the backplane is faulty. If the alarm occurs together with the “minor alarm of the standing wave ratio of the transmitter combiner”, the backplane alarm line may be faulty. 3. If the alarm indicator on the panel is on at the same time, it is required to check whether the connectors between the set-top jumper, main feeder and antenna are poorly contacted, and check for water leakage. 4. If none of the above measures works, please contact the regional office of ZTE Corporation. Alarm type: Equipment alarm
2.3.4Communication interruption of the OMU Alarm code: 0x1701 Alarm content: OMU communication interruption Alarm level: 2 Alarm cause: LAPD link disconnection between OMU and BSC, OMU fault, BTS rack power-off, fault of LAPD, SMB, T network board of the BSC, etc. Influence of the alarm: Affecting the reset and startup of the BTS and the information transmission between the BTS and the BSC, and the operation and maintenance of BTS will be interrupted. Time limit of handling: Handle it at once. Handling process: 1. Check whether the boards of BSC, e.g., LAPD, SMB, work normally, and whether there is any alarm present, if there is, clear it first. 2. Check whether the LAPD timeslot of the OMU is allocated correctly. 3. Check whether the E1 line is connected through. 4. Check whether the BTS rack is powered on, and whether OMU is started normally. 5. Check whether the BIE of BTS works normally. Clear the alarms first if any.
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Chapter 2 Alarm Handling
6. If none of the above measures works, please contact the regional office of ZTE Corporation. Alarm type: Communication alarm
2.4Level- 3 alarm 2.4.1Check error of the uplink data from the receiving processor to the channel processor 2.4.1.1Data check error of both the main-set and sub-set uplink data from the receiving processor to the channel processor (DSP0) Alarm code: 0xA08 Alarm content: Data check error of both the main-set and sub-set uplink data from the receiving processor (RPP) to the channel processor (CHP) (DSP0) Alarm level: 3 Alarm cause: Severe interference exists in the transmission channel from the RPP to the CHP (or the lines are poorly contacted). Influence of the alarm: The signal quality of the radio interface will deteriorate drastically, affecting the voice quality and even the assignment will fail. Time limit of handling: Handle it as soon as possible. Handling process: 1. Check whether the CKU is properly inserted. 2. Check whether the backplane line gets loose. 3. Check whether the bit switch for the transmission matching resistance on the backplane is set properly. 4. If none of the above operations works, reset the BTS to check if the fault still exists. 5. If none of the above measures works, please contact the regional office of ZTE Corporation. Alarm type: Equipment alarm
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Maintenance Manual for ZXG10-BTS (V1A)
2.4.1.2Data check error of both the main-set and sub-set uplink data from the receiving processor to the channel processor (DSP1). Alarm code: 0xA09 Alarm content: Data check error of both the main-set and sub-set uplink data from the receiving processor (RPP) to the channel processor (CHP) (DSP1) Alarm level: 3 Alarm cause: Severe interference exists in the transmission channel from the RPP to the CHP (or the lines are poorly contacted). Influence of the alarm: The signal quality of the radio interface will deteriorate drastically, the uplink bit error will occur in timeslot 1 and timeslot 5. In serious situations, the conversation will be interrupted and the assignment will fail. Time limit of handling: Handle it as soon as possible. Handling process: 1. Check whether the CKU is properly inserted. 2. Check whether the backplane line gets loose. 3. Check whether the bit switch for the transmission matching resistance on the backplane is set properly. 4. If none of the above operations works, reset the BTS to check if the fault still exists. 5. If none of the above measures works, please contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.4.1.3Data check error of both the main-set and sub-set uplink data from the receiving processor to the channel processor (DSP2). Alarm code: 0xA0A Alarm content: Data check error of both the main-set and sub-set uplink data from the receiving processor (RPP) to the channel processor (CHP) (DSP2) Alarm level: 3 -22-
Chapter 2 Alarm Handling
Alarm cause: Severe interference exists in the transmission channel from the RPP to the CHP (or the lines are poorly contacted). Influence of the alarm: The signal quality of the radio interface will deteriorate drastically, the uplink bit error will occur in timeslot 2 and timeslot 6. In serious situations, the conversation will be interrupted and the assignment will fail. Time limit of handling: Handle it as soon as possible. Handling process: 1. Check whether the CKU is properly inserted. 2. Check whether the backplane line gets loose. 3. Check whether the bit switch for the transmission matching resistance on the backplane is set properly. 4. If none of the above operations works, reset the BTS to check if the fault still exists. 5. If none of the above measures works, please contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.4.1.4Data check error of both the main-set and sub-set uplink data from the receiving processor to the channel processor (DSP3). Alarm code: 0xA0B Alarm content: Data check error of both the main-set and sub-set uplink data from the receiving processor (RPP) to the channel processor (CHP) (DSP3) Alarm level: 3 Alarm cause: Severe interference exists in the transmission channel from the RPP to the CHP (or the lines are poorly contacted). Influence of the alarm: The signal quality of the radio interface will deteriorate drastically, the uplink bit error will occur in timeslot 3 and timeslot 7. In serious situations, the conversation will be interrupted and the assignment will fail. Time limit of handling: Handle it as soon as possible.
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Maintenance Manual for ZXG10-BTS (V1A)
Handling process: 1. Check whether the CKU is properly inserted. 2. Check whether the backplane line gets loose. 3. Check whether the bit switch for the transmission matching resistance on the backplane is set properly. 4. If none of the above operations works, reset the BTS to check if the fault still exists. 5. If none of the above measures works, please contact the regional office of ZTE Corporation. Alarm type: Equipment alarm
2.4.2Frame unit fault 2.4.2.1Fault of the interface clock between the frame unit controller and the BS CKU Alarm code: 0xA0D Alarm content: Fault of FUC_CKU interface clock Alarm level: 3 Alarm cause: Fault of the BTS CKU, fault of the transmission clock line, or fault of the clock interface on the FU. Influence of the fault: Affecting the normal communication between the baseband processing unit and OMU and CU, resulting in failure of normal operation of the whole CU. Time limit of handling: Handle it at once. Handling process: 1. Check whether alarms occur on the CKU board. 2. Check whether the line between the CKU and CU is connected reliably. 3. If none of above measures works, replace the TRU. Alarm type: Equipment alarm
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Chapter 2 Alarm Handling
2.4.2.2Read/write error of the flash memory in the FU Alarm code: 0xA0E Alarm content: FLASH MEMORY error Alarm level: 3 Alarm cause: Too many times of the FLASH programming, read/write error or the software checksum error. Influence of the alarm: The baseband processing unit fails to obtain the correct software version from the flash memory, and the whole FU fails to work normally. Time limit of handling: Handle it as soon as possible. Handling process: 1. Reset the FU first to see whether the alarm can be recovered. If this alarm can be recovered, it indicates this alarm is caused by external interference when the CPU reads the data from the flash memory. This FU should be able to work normally after resetting. 2. If this alarm cannot be recovered by resetting, contact the regional office of ZTE Corporation as soon as possible. Alarm type: Equipment alarm 2.4.2.3Overflow of the “watchdog” in the FUC Alarm code: 0xA18 Alarm content: Overflow of the WatchDog in the FUC. Alarm level: 3 Alarm cause: The FUC program is out of service. Influence of the alarm: No response of DSP or partial channels unavailable. Time limit of handling: Handle it as soon as possible. Handling process:
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Maintenance Manual for ZXG10-BTS (V1A)
1. Reset the FUC first to see whether this alarm can be recovered. 2. If this alarm cannot be recovered by resetting, contact the regional office of ZTE Corporation as soon as possible. Alarm type: Equipment alarm 2.4.2.4LAPD link disconnection of the FUC and the BSC Alarm code: 0xA26 Alarm content: LAPD link disconnection of FU and BSC. Alarm level: 3 Alarm cause: No connection between layer-2 software of the FUC and the BSC during a certain period of time. Influence of the alarm: This FUC fails to work. If this FUC is BCCH-TRX, services of the cell will be affected. Time limit of handling: Handle it as soon as possible. Handling process: 1. Check whether this alarm occurs to other FUCs of this BS. If this alarm occurs to all FUCs of this BS, check whether any alarm occurs to the BIE and whether the E1 line is connected properly, and check whether any alarm occurs to the SMB, LAPD and DSN board of the BSC. If any, locate this fault and clear it. 2. Check whether the BSC data is correct, especially the T network connection data and the SMB timeslot connection data. 3. If only the LAPD of one layer TRU is disconnected, check whether the backplane cable is connected properly. 4. If only the LAPD of one TRU is disconnected, reset the FUC. 5. If the problem still exists, please contact the regional office of ZTE Corporation. Alarm type: Communication alarm
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Chapter 2 Alarm Handling
2.4.2.5Downlink check error between the FU and the CU Alarm code: 0xB00 Alarm content: DLRC_AL downlink check error Alarm level: 3 Alarm cause: Interference occurs to the link between the FU and CU. Influence of the alarm: Numerous bit errors occur between CHP and CUI. The downlink is faulty, and this TRU fails to provide normal conversation service. Time limit of handling: Handle it at once. Handling process: 1. Check whether the frequency-hopping cable on the backplane is connected properly. If not, replace the frequency-hopping cable. 2. If the fault still exists, this TRU is faulty, please replace the board. Alarm type: Equipment alarm
2.4.3Inconsistency of software versions 2.4.3.1Inconsistency of the channel processor (CHP) software versions Alarm code: 0xA23 Alarm content: Inconsistency of the CHP software versions Alarm level: 3 Alarm cause: Error loading of CHP software versions Influence of the alarm: DSP fails to run normally over FU. Time limit of handling: Handle it at once. Handling process: Download a new CHP software version. Alarm type: Error handling.
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Maintenance Manual for ZXG10-BTS (V1A)
2.4.3.2Inconsistency of the frame unit controller (FUC) software versions Alarm code: 0xA24 Alarm content: Inconsistency of the FUC software versions Alarm level: 3 Alarm cause: Error loading of FUC software versions Influence of the alarm: FUC fails to run normally. Time limit of handling: Handle it at once. Handling process: Download a new FUC software version. Alarm type: Error handling.
2.4.4Out-of-lock of the transmitting RF self oscillator 2.4.4.1Out-of-lock of the transmitting RF self oscillator 3 Alarm code: 0xB04 Alarm content: Out-of-lock of the transmitting RF self oscillator 3 Alarm level: 3 Alarm cause: Clock signal instability or TRU phrase-locked loop failure Influence of the alarm: This TRU may fail to make a call. Time limit of handling: Handle it at once. Handling process: Replace the TRU. Alarm type: Equipment alarm 2.4.4.2Out-of-lock of the transmitting RF self oscillator 4 Alarm code: 0xB05 Alarm content: Out-of-lock of the transmitting RF self oscillator 4
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Chapter 2 Alarm Handling
Alarm level: 3 Alarm cause: Clock signal instability or TRU phrase-locked loop failure Influence of the alarm: This TRU may fail to make a call. Time limit of handling: Handle it at once. Handling process: Replace the TRU. Alarm type: Equipment alarm 2.4.4.3Out-of-lock of the transmitting IF self oscillator 5 Alarm code: 0xB06 Alarm content: Out-of-lock of the transmitting IF self oscillator 5 Alarm level: 3 Alarm cause: Clock signal instability or TRU phrase-locked loop failure Influence of the alarm: This TRU may fail to make a call. Time limit of handling: Handle it at once. Handling process: Replace the TRU. Alarm type: Equipment alarm
2.4.5Error of software versions 2.4.5.1Error of the carrier unit (CU) software version Alarm code: 0xB0F Alarm content: The CU software version error Alarm level: 3 Alarm cause: The CU software version error Influence of the alarm: The CU fails to start normally, and this TRU cannot make a call.
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Maintenance Manual for ZXG10-BTS (V1A)
Time limit of handling: Handle it at once. Handling process: 1. Reset TRU. 2. If the resetting fails, contact the regional office of ZTE Corporation to replace the CU version. Alarm type: Error handling. 2.4.5.2Error of the BS clock unit (CKU) software version Alarm code: 0xC0C Alarm content: The CKU software version error Alarm level: 3 Alarm cause: The CKU software version error Influence of the alarm: This BS can operate normally but is unable to be maintained and monitored. Time limit of handling: Handle it as soon as possible. Handling process: 1. Reset the CKU to see whether this alarm can be recovered. 2. If this alarm cannot be recovered, contact the regional office of ZTE Corporation as soon as possible. Alarm type: Error handling. 2.4.5.3Error of the BS external alarm module (EAM) layer3 software version Alarm code: 0xF2A Alarm content: The EAM layer3 software version error Alarm level: 3 Alarm cause: The layer3 software version error or communication error Influence of the alarm: OMU fails to monitor the running of EAM, and in-cabinet alarms and those
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Chapter 2 Alarm Handling
of external backbone nodes. Time limit of handling: Handle it as soon as possible. Handling process: 1. Insert the board properly and reset it. 2. In case that the alarm persists, contact the regional office of ZTE Corporation to replace the version. Alarm type: Error handling.
2.4.6Fault of the BS clock unit (CKU) 2.4.6.1Alarm of error BS CKU frame numbers Alarm code: 0xC01 Alarm content: The CKU frame numbers error Alarm level: 3 Alarm cause: Discontinuity or loss of frame numbers Influence of the alarm: This BS fails to run normally. Time limit of handling: Handle it at once. Handling process: 1. Reset the CKU, and view whether the alarm occurs again. 2. If the alarm cannot be recovered, replace the CKU. Alarm type: Equipment alarm 2.4.6.2Error of the BS CKU parameter configuration Alarm code: 0xC09 Alarm content: The CKU parameter configuration error Alarm level: 3
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Maintenance Manual for ZXG10-BTS (V1A)
Alarm cause: Parameter configuration error Influence of the alarm: This BS can operate normally but fails to be synchronous over the entire network. Time limit of handling: Handle it at once. Handling process: Re-configure the CKU parameters on the background and make the CKU parameters synchronous with the BS. Alarm type: Error handling. 2.4.6.3Abnormality of the 8K clock signal between BS interface equipment (BIE) and CKU Alarm code: 0xC0A Alarm content: Abnormality of the 8K clock signal between BIE and CKU Alarm level: 3 Alarm cause: Abnormality of the 8K clock signal between BIE and CKU Influence of the alarm: This BS can operate normally but fails to be synchronous over the entire network. Time limit of handling: Handle it as soon as possible. Handling process: 1. Reinsert the CKU board or reset the CKU board. 2. Check the operation of the BIE board or reset the BIE board. 3. Check the connection of the E1 cable. 4. If the alarm exists still, set the synchronization mode of the CKU to the free-run mode, and then contact the regional office of ZTE Corporation. Alarm type: Equipment alarm
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Chapter 2 Alarm Handling
2.4.7Fault of BIE switching chips 2.4.7.1Fault of the BIE switching chip 1 Alarm code: 0xD01 Alarm content: Fault of the BIE switching chip 1 Alarm level: 3 Alarm cause: Faulty chip or abnormal clock signal Influence of the alarm: The conversation is abnormal, or links between a part of TRUs and BSC cannot be established, or the system fails to start normally. Time limit of handling: Handle it at once. Handling process: 1. Insert the board properly and reset it. 2. If the alarm persists, it indicates that the D401 chip on the board may be out of order, replace the board. 3. If the alarm still exists, the system clock may be abnormal, then reset the CKU. 4. In case that the alarm still exists, contact the regional office of ZTE Corporation . Alarm type: Equipment alarm 2.4.7.2Fault of the BIE switching chip 2 Alarm code: 0xD02 Alarm content: Fault of the BIE switching chip 2 Alarm level: 3 Alarm cause: Faulty chip or abnormal clock signal Influence of the alarm: The conversation is abnormal, or links between a part of TRUs and BSC cannot be established, or the system fails to start normally. Time limit of handling: Handle it at once. -33-
Maintenance Manual for ZXG10-BTS (V1A)
Handling process: 1. Insert the board properly and reset it. 2. If the alarm appears again, it indicates that the D402 chip on the board may be out of order, replace the board. 3. If the alarm still exists, the system clock may be abnormal, then reset the CKU. 4. In case that the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.4.7.3Fault of the BIE switching chip 3 Alarm code: 0xD03 Alarm content: Fault of the BIE switching chip 3 Alarm level: 3 Alarm cause: Faulty chip or abnormal clock signal Influence of the alarm: The conversation is abnormal, or links between a part of TRUs and BSC cannot be established, or the system fails to start normally. Time limit of handling: Handle it at once. Handling process: 1. Insert the board properly and reset it. 2. If the alarm appears again, it indicates that the D403 chip on the board may be out of order, replace the board. 3. If the alarm still exists, the system clock may be abnormal, then reset the CKU. 4. In case that the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.4.7.4Fault of the BIE switching chip 4 Alarm code: 0xD04 -34-
Chapter 2 Alarm Handling
Alarm content: Fault of the BIE switching chip 4 Alarm level: 3 Alarm cause: Faulty chip or abnormal clock signal Influence of the alarm: The conversation is abnormal, or links between a part of TRUs and BSC cannot be established, or the system fails to start normally. Time limit of handling: Handle it at once. Handling process: 1. Insert the board properly and reset it. 2. If the alarm persists, it indicates that the D404 chip on the board may be out of order, replace the board. 3. If the alarm still exists, the system clock may be abnormal, then reset the CKU. 4. In case that the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm
2.4.8Faults of the BIE E1 interface 2.4.8.1Read/write fault of the BIE E1 interface chip 1 Alarm code: 0xD05 Alarm content: Read/write fault of the BIE E1 interface chip 1 Alarm level: 3 Alarm cause: Chip or communication failure Influence of the alarm: The conversation is abnormal, or links between a part of TRUs and BSC cannot be established, or the system fails to start normally. Time limit of handling: Handle it at once. Handling process: 1. Insert the board properly and reset it. -35-
Maintenance Manual for ZXG10-BTS (V1A)
2. If the alarm appears again, it indicates that the D101 chip on the board may be out of order, replace the board. 3. In case that the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.4.8.2Read/write fault of the BIE E1 interface chip 2 Alarm code: 0xD06 Alarm content: Read/write fault of the BIE E1 interface chip 2 Alarm level: 3 Alarm cause: Chip or communication failure Influence of the alarm: The conversation is abnormal, or links between a part of TRUs and BSC cannot be established, or the system fails to start normally. Time limit of handling: Handle it at once. Handling process: 1. Insert the board properly and reset it. 2. If the alarm appears again, it indicates that the D201 chip on the board may be out of order, replace the board. 3. In case that the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.4.8.3Read/write fault of the BIE E1 interface chip 3 Alarm code: 0xD07 Alarm content: Read/write fault of the BIE E1 interface chip 3 Alarm level: 3 Alarm cause: Chip or communications failure Influence of the alarm: The conversation is abnormal, or links between a part of TRUs and BSC -36-
Chapter 2 Alarm Handling
cannot be established, or the system fails to start normally. Time limit of handling: Handle it at once. Handling process: 1. Insert the board properly and reset it. 2. If the alarm appears again, it indicates that the D301 chip on the board may be out of order, replace the board. 3. In case that the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.4.8.4Loss of the BIE E1 interface signal 1 Alarm code: 0xD08 Alarm content: Loss of BIE E1 interface signal 1 Alarm level: 3 Alarm cause: Chip failure, abnormal clock signal, or poor E1 connection Influence of the alarm: The conversation is abnormal, or links between a part of TRUs and BSC cannot be established, or the system fails to start normally. Time limit of handling: Handle it at once. Handling process: 1. Insert the board properly and reset it. 2. If the alarm persists, it indicates that the D101 chip on the board may be out of order, replace the board. 3. If the alarm still exists, the system clock may be abnormal, then reset the CKU. 4. If the alarm still exists, the physical link of the E1 A interface may be abnormal. 5. If the physical link of the E1 A interface is normal, and the alarm still exists, contact the regional office of ZTE Corporation.
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Maintenance Manual for ZXG10-BTS (V1A)
Alarm type: Equipment alarm 2.4.8.5Loss of the BIE E1 interface signal 2 Alarm code: 0xD09 Alarm content: Loss of BIE E1 interface signal 2 Alarm level: 3 Alarm cause: Chip failure, abnormal clock signal, or poor E1 connection Influence of the alarm: The conversation is abnormal, or links between a part of TRUs and BSC cannot be established, or the system fails to start normally. Time limit of handling: Handle it at once. Handling process: 1. Insert the board properly and reset it. 2. If the alarm appears again, it indicates that the D201 chip on the board may be out of order, replace the board. 3. If the alarm still exists, the system clock may be abnormal, then reset the CKU. 4. If the alarm still exists, the physical link of the E1 B interface may be abnormal. 5. If the physical link of the E1 B interface is normal, and the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.4.8.6Loss of the BIE E1 interface signal 3 Alarm code: 0xD0A Alarm content: Loss of BIE E1 interface signal 3 Alarm level: 3 Alarm cause: The conversation is abnormal, or links between a part of TRUs and BSC cannot be established, or the system fails to start normally.
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Influence of the alarm: Cascaded BTSs fails to start. Time limit of handling: Handle it at once. Handling process: 1. Insert the board properly and reset it. 2. If the alarm appears again, it indicates that the D301 chip on the board may be out of order, replace the board. 3. If the alarm still exists, the system clock may be abnormal, then reset the CKU. 4. If the alarm still exists, the physical link of the E1 C interface may be abnormal. 5. If the physical link of the E1 C interface is normal, while the alarm still exists, replace the BIE board of the cascaded BTS. 6. In case that the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.4.8.7Out of frame of the BIE E1 interface signal 1 Alarm code: 0xD11 Alarm content: Out of frame of the BIE E1 interface signal 1 Alarm level: 3 Alarm cause: Chip or clock failure, phase difference from the BSC clock, or poor E1 connection Influence of the alarm: For occasional occurrence, it has little impact on conversations. But frequent occurrence (once several minutes) will cause abnormal conversation or abnormal link establishment between the main rack TRU and the BSC. Time limit of handling: If it occurs occasionally, and the CKU is in free run mode, this alarm may be ignored; but for frequent occurrence, handle it as soon as possible. Handling process: 1. Insert the board properly and reset it.
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2. If the alarm persists, indicating that the D101 chip on the board may be out of order, replace the board. 3. If the alarm still exists, indicating that the system clock may be abnormal, reset the CKU. 4. If the alarm still exists, the physical link of the E1 A interface may be abnormal. 5. If the physical link is normal, and the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.4.8.8Out of frame of the BIE E1 interface signal 2 Alarm code: 0xD12 Alarm content: Out of frame of the BIE E1 interface signal 2 Alarm level: 3 Alarm cause: Chip or clock failure, phase difference from the BSC clock, or poor E1 connection Influence of the alarm: For occasional occurrence, it has little impact on conversations. But frequent occurrence (once several minutes) will cause abnormal conversations or abnormal link establishment between the extension rack TRU and the BSC. Time limit of handling: If it occurs occasionally, and the CKU is in free run mode, this alarm may be ignored; but for frequent occurrence, handle it as soon as possible. Handling process: 1. Insert the board properly and reset it. 2. If the alarm appears again, indicating that the D201 chip on the board may be out of order, replace the board. 3. If the alarm still exists, indicating that the system clock may be abnormal, reset the CKU. 4. If the alarm still exists, the physical link of the E1 B interface may be abnormal. 5. If the physical link is normal, while the alarm still exists, contact the regional office of ZTE Corporation.
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Alarm type: Equipment alarm 2.4.8.9Out of frame of the BIE E1 interface signal 3 Alarm code: 0xD13 Alarm content: Out of frame of the BIE E1 interface signal 3 Alarm level: 3 Alarm cause: Chip or clock failure, phase difference from the BSC clock, or poor E1 connection Influence of the alarm: For occasional occurrence, it has little impact on conversations. But frequent occurrence (once several minutes) will cause abnormal conversations or abnormal link establishment between the cascaded rack TRU and the BSC. Time limit of handling: If it occurs occasionally, and the CKU is in free run mode, this alarm may be ignored; but for frequent occurrence, handle it as soon as possible. Handling process: 1. Insert the board properly and reset it. 2. If the alarm appears again, indicating that the D301 chip on the board may be out of order, replace the board. 3. If the alarm still exists, indicating that the system clock may be abnormal, reset the CKU. 4. If the alarm still exists, the physical link of the E1 C interface may be abnormal. 5. If the physical link is normal, while the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm
2.4.9Alarm of fans of the BIE 2.4.9.1Fan 1 alarm Alarm code: 0xF01 Alarm content: Alarm of fan 1
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Alarm level: 3 Alarm cause: Failure of the top fan of the main rack Influence of the alarm: The poor ventilation of the BTS cabinet will cause the temperature increase and unstable BTS operation. Time limit of handling: Handle it at once. Handling process: 1. Observe the running status and alarm cables of EAM. If there is an alarm for EAM or the backplane alarm cables are not connected properly, solve these problems first. 2. Observe whether the fan in this position is switched on. 3. If the fan is switched on already, while the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.4.9.2Fan 2 alarm Alarm code: 0xF02 Alarm content: Alarm of fan 2 Alarm level: 3 Alarm cause: Failure of the middle fan of the main rack Influence of the alarm: The poor ventilation of the BTS cabinet will cause the temperature increase and unstable BTS operation. Time limit of handling: Handle it at once. Handling process: 1. Observe the running status and alarm cables of EAM. If there is an alarm for EAM or the backplane alarm cables are not connected properly, solve these problems first. 2. Observe whether the fan in this position is switched on.
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3. If the fan is switched on already, while the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.4.9.3Fan 3 alarm Alarm code: 0xF03 Alarm content: Alarm of fan 3 Alarm level: 3 Alarm cause: Failure of the bottom fan of the main rack Influence of the alarm: The poor ventilation of the BTS cabinet will cause the temperature increase and unstable BTS operation. Time limit of handling: Handle it at once. Handling process: 1. Observe the running status and alarm cables of EAM. If there is an alarm for EAM or the backplane alarm cables are not connected properly, solve these problems first. 2. Observe whether the fan in this position is switched on. 3. If the fan is switched on already, while the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.4.9.4Fan 4 alarm Alarm code: 0xF04 Alarm content: Alarm of fan 4 Alarm level: 3 Alarm cause: Failure of the top fan of the extension rack 1 Influence of the alarm: The poor ventilation of the BTS cabinet will cause the temperature increase
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and unstable BTS operation. Time limit of handling: Handle it at once. Handling process: 1. Observe the running status and alarm cables of EAM, if there is an alarm for EAM or the backplane alarm cables are not connected properly, solve these problems first. 2. Observe whether the fan in this position is switched on. 3. If the fan is switched on already, while the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.4.9.5Fan 5 alarm Alarm code: 0xF05 Alarm content: Alarm of fan 5 Alarm level: 3 Alarm cause: Failure of the middle fan of the extension rack 1 Influence of the alarm: The poor ventilation of the BTS cabinet will cause the temperature increase and unstable BTS operation. Time limit of handling: Handle it at once. Handling process: 1. Observe the running status and alarm cables of EAM. If there is an alarm for EAM or the backplane alarm cables are not connected properly, solve these problems first. 2. Observe whether the fan in this position is switched on. 3. If the fan is switched on already, while the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm
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2.4.9.6Fan 6 alarm Alarm code: 0xF06 Alarm content: Alarm of fan 6 Alarm level: 3 Alarm cause: Failure of the bottom fan of the extension rack 1 Influence of the alarm: The poor ventilation of the BTS cabinet will cause the temperature increase and unstable BTS operation. Time limit of handling: Handle it at once. Handling process: 1. Observe the running status and alarm cables of EAM. If there is an alarm for EAM or the backplane alarm cables are not connected properly, solve these problems first. 2. Observe whether the fan in this position is switched on. 3. If the fan is switched on already, while the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.4.9.7Fan 7 alarm Alarm code: 0xF07 Alarm content: Alarm of fan 7 Alarm level: 3 Alarm cause: Failure of the top fan of the extension rack 2 Influence of the alarm: The poor ventilation of the BTS cabinet will cause the temperature increase and unstable BTS operation. Time limit of handling: Handle it at once. Handling process:
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Maintenance Manual for ZXG10-BTS (V1A)
1. Observe the running status and alarm cables of EAM. If there is an alarm for EAM or the backplane alarm cables are not connected properly, solve these problems first. 2. Observe whether the fan in this position is switched on. 3. If the fan is switched on already, while the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.4.9.8Fan 8 alarm Alarm code: 0xF08 Alarm content: Alarm of fan 8 Alarm level: 3 Alarm cause: Failure of the middle fan of the extension rack 2 Influence of the alarm: The poor ventilation of the BTS cabinet will cause the temperature increase and unstable BTS operation. Time limit of handling: Handle it at once. Handling process: 1. Observe the running status and alarm cables of EAM. If there is an alarm for EAM or the backplane alarm cables are not connected properly, solve these problems first. 2. Observe whether the fan in this position is switched on. 3. If the fan is switched on already, while the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.4.9.9Fan 9 alarm Alarm code: 0xF09 Alarm content: Alarm of fan 9
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Alarm level: 3 Alarm cause: Failure of the bottom fan of the extension rack 2 Influence of the alarm: The poor ventilation of the BTS cabinet will cause the temperature increase and unstable BTS operation. Time limit of handling: Handle it at once. Handling process: 1. Observe the running status and alarm cables of EAM. If there is an alarm for EAM or the backplane alarm cables are not connected properly, solve these problems first. 2. Observe whether the fan in this position is switched on. 3. If the fan is switched on already, while the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm
2.4.10Alarm of temperature sensor 2.4.10.1Alarm of temperature sensor 1 Alarm code: 0xF0D Alarm content: Alarm of temperature sensor 1 Alarm level: 3 Alarm cause: The temperature at the upper part of the main rack is too high. Influence of the alarm: The high temperature inside the BTS cabinet will cause the unstable BTS operation. Time limit of handling: Handle it at once. Handling process: 1. Observe the running status and alarm cables of EAM. If there is an alarm for EAM or the backplane alarm cables are not connected properly, solve these problems first.
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2. Observe whether the fan is switched on already, if not, switch on the fan. 3. Observe whether the temperature is too high, and check the running of the air conditioner. 4. If the environment temperature cannot be lowered, shut down part of TRU to lower the temperature inside the rack. 5. If both the fan and air conditioner are normal, while the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.4.10.2Alarm of temperature sensor 2 Alarm code: 0xF0E Alarm content: Alarm of temperature sensor 2 Alarm level: 3 Alarm cause: The temperature at the lower part of the main rack is too high. Influence of the alarm: The high temperature inside the BTS cabinet will cause the unstable BTS operation. Time limit of handling: Handle it at once. Handling process: 1. Observe the running status and alarm cables of EAM. If there is an alarm for EAM or the backplane alarm cables are not connected properly, solve these problems first. 2. Observe whether the fan is switched on already; if not, switch on the fan. 3. Observe whether the temperature is too high, and check the running of the air conditioner. 4. If the environment temperature cannot be lowered, shut down part of TRU to lower the temperature inside the rack. 5. If both the fan and air conditioner are normal, while the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm
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2.4.10.3Alarm of temperature sensor 3 Alarm code: 0xF0F Alarm content: Alarm of temperature sensor 3 Alarm level: 3 Alarm cause: The temperature at the upper part of the extension rack 1 is too high. Influence of the alarm: The high temperature inside the BTS cabinet will cause the unstable BTS operation. Time limit of handling: Handle it at once. Handling process: 1. Observe the running status and alarm cables of EAM. If there is an alarm for EAM or the backplane alarm cables are not connected properly, solve these problems first. 2. Observe whether the fan is switched on already; if not, switch on the fan. 3. Observe whether the temperature is too high, and check the running of the air conditioner. 4. If the environment temperature cannot be lowered, shut down part of TRU to lower the temperature inside the rack. 5. If both the fan and air conditioner are normal, while the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.4.10.4Alarm of temperature sensor 4 Alarm code: 0xF10 Alarm content: Alarm of temperature sensor 4 Alarm level: 3 Alarm cause: The temperature at the lower part of the extension rack 1 is too high. Influence of the alarm: The high temperature inside the BTS cabinet will cause the unstable BTS
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operation. Time limit of handling: Handle it at once. Handling process: 1. Observe the running status and alarm cables of EAM. If there is an alarm for EAM or the backplane alarm cables are not connected properly, solve these problems first. 2. Observe whether the fan is switched on already; if not, switch on the fan. 3. Observe whether the temperature is too high, and check the running of the air conditioner. 4. If the environment temperature cannot be lowered, shut down part of TRU to lower the temperature inside the rack. 5. If both the fan and air conditioner are normal, while the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.4.10.5Alarm of temperature sensor 5 Alarm code: 0xF11 Alarm content: Alarm of temperature sensor 5 Alarm level: 3 Alarm cause: The temperature at the upper part of the extension rack 2 is too high. Influence of the alarm: The high temperature inside the BTS cabinet will cause the unstable BTS operation. Time limit of handling: Handle it at once. Handling process: 1. Observe the running status and alarm cables of EAM. If there is an alarm for EAM or the backplane alarm cables are not connected properly, solve these problems first. 2. Observe whether the fan is switched on already; if not, switch on the fan.
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3. Observe whether the temperature is too high, and check the running of the air conditioner. 4. If the environment temperature cannot be lowered, shut down part of TRU to lower the temperature inside the rack. 5. If both the fan and air conditioner are normal, while the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.4.10.6Alarm of temperature sensor 6 Alarm code: 0xF12 Alarm content: Alarm of temperature sensor 6 Alarm level: 3 Alarm cause: The temperature at the lower part of the extension rack 2 is too high. Influence of the alarm: The high temperature inside the BTS cabinet will cause the unstable BTS operation. Time limit of handling: Handle it at once. Handling process: 1. Observe the running status and alarm cables of EAM. If there is an alarm for EAM or the backplane alarm cables are not connected properly, solve these problems first. 2. Observe whether the fan is switched on already; if not, switch on the fan. 3. Observe whether the temperature is too high, and check the running of the air conditioner. 4. If the environment temperature cannot be lowered, shut down part of TRU to lower the temperature inside the rack. 5. If both the fan and air conditioner are normal, while the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm
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2.4.11Fault of buses 2.4.11.1Fault of the frame unit bus Alarm code: 0x1002 Alarm content: FUBUS fault (communication interruption between OMU and all FUs) Alarm level: 3 Alarm cause: High-speed HDLC bus failure, or OMU hardware error Influence of the alarm: FUC and CHP versions and parameter configurations cannot be updated, and alarms cannot be reported. Time limit of handling: Handle it as soon as possible. Handling process: 1. Reset or reinsert the OMU board. 2. Check the backplane and its connections. 3. If none of the measures works, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.4.11.2Fault of the low-speed bus Alarm code: 0x1003 Alarm content: OBBUS fault (communication interruption between OMU and BIE, CKU and EAM) Alarm level: 3 Alarm cause: Low-speed (64K) HDLC bus failure, or OMU hardware error Influence of the alarm: Parameter configurations of low-speed boards cannot be updated, and alarms cannot be reported. Time limit of handling: Handle it at once. Handling process:
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1. Reset or reinsert the board. 2. Check the backplane and its connections. 3. If none of the measures works, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm
2.4.12Alarm of power amplifiers (PAs) 2.4.12.1Alarm of the PA output power Alarm code: 0x1100 Alarm content: Alarm of the PA output power Alarm level: 3 Alarm cause: The direct reason is that the PA output power is different from the CU control power by over one time. And it may be caused by the aged PA, failed power detection circuit and narrow range of the detection threshold. Influence of the alarm: This TRU may be unable to communicate, and the power is out of control, and CUI shuts down the PA. Time limit of handling: Handle it at once. Handling process: 1. Reset the TRU and see whether the alarm can be recovered. 2. Replace the PA board or TRU, and contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.4.12.2Alarm of the PA voltage standing wave ratio Alarm code: 0x1101 Alarm content: Alarm of the PA voltage standing wave ratio Alarm level: 3 Alarm cause: The direct reason is that the reverse power is too high. And it may be caused by the -53-
Maintenance Manual for ZXG10-BTS (V1A)
open PA output or high impedance. Influence of the alarm: This TRU cannot communicate and the PA is damaged. Time limit of handling: Handle it as soon as possible. Handling process: 1. Check the connection of the PA output with the cable, making the connection proper. 2. Check the PAC detection circuit, if the PA board fails, replace it. Alarm type: Equipment alarm 2.4.12.3Alarm of over-current of the PA tube Alarm code: 0x1102 Alarm content: Alarm of over-current of the PA tube Alarm level: 3 Alarm cause: Over-current of the PA tube Influence of the alarm: The PA is damaged, and the CUI shuts down the power output for protection. Time limit of handling: Handle it as soon as possible. Handling process: Check the PAC detection circuit, if the PA board fails, replace the PA board. Alarm type: Equipment alarm 2.4.12.4Alarm of over-voltage of the PA tube Alarm code: 0x1103 Alarm content: Alarm of over-voltage of the PA tube Alarm level: 3 Alarm cause: Over-current of the PA tube Influence of the alarm: The PA is damaged, and the CUI shuts down the power output for protection.
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Time limit of handling: Handle it as soon as possible. Handling process: Check the PAC detection circuit, if the PA board fails, replace the PA board. Alarm type: Equipment alarm 2.4.12.5Major alarm of over-temperature of the PA Alarm code: 0x1105 Alarm content: Major alarm of over-temperature (>=80˚C) of the PA Alarm level: 3 Alarm cause: The PA temperature is too high, which may be caused by its long-term full-power operation, the long-term off status of fans, over-temperature of the environment, or faults of the detection circuit. Influence of the alarm: The power output of this TRU is shut down for protection, and the PA ages more quickly. Time limit of handling: Handle it at once. Handling process: 1. Check the running of fans and the environment temperature. 2. If the fan works normally and the environment temperature is normal, while the PA temperature alarm exists still, it may be caused by the faulty detection circuit, so replace the PA as soon as possible. Alarm type: Equipment alarm
2.4.13Alarm of low-noise amplifiers of the receiver multi-coupler 2.4.13.1Alarm of low-noise amplifier 1 of the receiver multi-coupler Alarm code: 0x1200 Alarm content: Alarm of low-noise amplifier 1 of the receiver multi-coupler Alarm level: 3
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Maintenance Manual for ZXG10-BTS (V1A)
Alarm cause: Faulty low-noise amplifier of the multi-coupler, interference signals received by EAM, or error connections of EAM alarm cables Influence of the alarm: The faulty low-noise amplifier of the multi-coupler will affects conversations, while the alarm caused by the interference signal received by EAM will have no impact. Time limit of handling: Handle it at once. Handling process: 1. Check whether the EAM works normally. 2. Check whether the EAM alarm cable of the backplane is faulty. If the alarm occurs at the same time as the “alarm of low-noise amplifier 2 of the receiver multi-coupler”, something may be wrong with the backplane alarm cable. 3. If none of the measures works, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.4.13.2Alarm of low-noise amplifier 2 of the receiver multi-coupler Alarm code: 0x1201 Alarm content: Alarm of low-noise amplifier 2 of the receiver multi-coupler Alarm level: 3 Alarm cause: Faulty low-noise amplifier of the multi-coupler, interference signals received by EAM, or error connections of EAM alarm cables Influence of the alarm: The faulty low-noise amplifier of the multi-coupler will affects conversations, while the alarm caused by the interference signal received by EAM will have no impact. Time limit of handling: Handle it at once. Handling process: 1. Check whether the EAM works normally. 2. Check whether anything is wrong with the EAM alarm cable of the backplane. If the alarm occurs -56-
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at the same time as the “alarm of low-noise amplifier 1 of the receiver multi-coupler”, something may be wrong with the backplane alarm cable. 3. If none of the measures works, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm
2.4.14Power alarm 2.4.14.1Alarm of power supply of the carrier shelf Alarm code: 0x1400 Alarm content: PSB alarm Alarm level: 3 Alarm cause: Over-voltage, under-voltage, over-current and power-off of the PSB power supply; interference signals received by EAM or error connections of EAM alarm cables Influence of the alarm: The PSB power supply fault will affect the carrier shelf, especially the whole carrier shelf may be out of work in serious cases. The alarm caused by the interference signal received by EAM or error connection of the EAM alarm cable will have no influence on the system. Time limit of handling: Handle it as soon as possible. Handling process: 1. Check whether the EAM works normally. 2. Check whether anything is wrong with the EAM alarm cable of the backplane. 3. If alarm indicators on the panel light up at the same time, replace the PSB and contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.4.14.2Alarm of power supply of the public shelf Alarm code: 0x1500 Alarm content: PSA alarm
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Alarm level: 3 Alarm cause: Over-voltage, under-voltage, over-current and power-off of the PSA power supply; interference signals received by EAM or error connections of EAM alarm cables Influence of the alarm: The PSA power supply fault will affect the public shelf, especially the whole public shelf may be out of work in serious cases. The alarm caused by the interference signal received by EAM or error connection of the EAM alarm cable will have no influence on the system. Time limit of handling: Handle it as soon as possible. Handling process: 1. Check whether the EAM works normally. 2. If alarm indicators on the panel light up at the same time, replace the PSA and contact the regional office of ZTE Corporation. Alarm type: Equipment alarm
2.4.15Interruption of board communications 2.4.15.1Interruption of the BS interface board communications Alarm code: 0x1702 Alarm content: Interruption of the BIE communications Alarm level: 3 Alarm cause: The HDLC link between OMU and BIE disconnects. Influence of the alarm: The BIE polling is faulty, and no data can be transferred between BIE and OMU. Furthermore, the BIE data cannot be configured, and the BIE status cannot be reported. Time limit of handling: Handle it as soon as possible. Handling process: The system runs still, but no data can be configured. If the link of BIE is disconnected for a long time, users may try the following methods for troubleshooting: 1. Check whether the BIE board is inserted properly. 2. Reset the BIE board to see whether the alarm is recovered.
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3. Check whether the clock board works normally. 4. If none of the measures works, contact the regional office of ZTE Corporation. Alarm type: Communication alarm 2.4.15.2Interruption of the BS CKU communications Alarm code: 0x1703 Alarm content: Interruption of the CKU communications Alarm level: 3 Alarm cause: The HDLC link between OMU and CKU is disconnected. Influence of the alarm: The CKU polling is faulty, and no data can be transferred between CKU and OMU. Furthermore, the CKU data cannot be configured, and the CKU status cannot be reported. Time limit of handling: Handle it as soon as possible. Handling process: The system runs still, but no data can be configured. If the link of CKU is disconnected for a long time, users may try the following methods for troubleshooting. 1. Check whether the CKU board is inserted properly. 2. Reset the CKU board to see whether the alarm is recovered. 3. If none of the measures works, contact the regional office of ZTE Corporation. Alarm type: Communication alarm 2.4.15.3Communication interruption of the BS environment alarm unit Alarm code: 0x1704 Alarm content: Interruption of the EAM communications Alarm level: 3 Alarm cause: The HDLC link between OMU and EAM is disconnected. Influence of the alarm: The EAM polling is faulty, and no data can be transferred between EAM and OMU. Furthermore, the EAM data cannot be configured, and the EAM status cannot be reported. -59-
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Time limit of handling: Handle it as soon as possible. Handling process: The system runs still, but no data can be configured. If the alarm is caused only by the long-term link disconnection of EAM, users may try the following methods for troubleshooting: 1. Check whether the EAM board is inserted properly. 2. Reset the EAM board to see whether the alarm is recovered. 3. Check whether the clock board works normally. 4. If none of the measures works, contact the regional office of ZTE Corporation. Alarm type: Communication alarm 2.4.15.4Interruption of the communication link of the public shelf power supply board Alarm code: 0x1708 Alarm content: Disconnection of the PSA communication link Alarm level: 3 Alarm cause: EAM power-off, off-line or faulty; OMU power-off, off-line or faulty Influence of the alarm: It will impact the PSA operation and maintenance. Time limit of handling: Handle it as soon as possible. Handling process: 1. Check whether there are alarms and faults in the OMU and EAM. If yes, clear the alarms accordingly. 2. If both the OMU and EAM work normally, check whether the alarm cable of the backplane is connected properly. For anything abnormal, resolve it. 3. If the fault still exists, replace the board and contact the regional office of ZTE Corporation. . Alarm type: Communication alarm
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2.4.16Timeout of board unreported 2.4.16.1Timeout of the BS OMU unreported Alarm code: 0x1801 Alarm content: Timeout of the OMU unreported Alarm level: 3 Alarm cause: The direct reason is that the O&M messages of the board can not be received at the BSC side in a period. And it may be caused by blocked links and a short timer at the BSC side (the alarm will be recovered soon); or the interrupted communication link between OMU and BSC. Influence of the alarm: The alarm conditions of the active/standby OMU and other BTS boards can not be viewed until the alarm is recovered. Time limit of handling: Handle it as soon as possible. Handling process: 1. If the alarm is recovered soon, improve the quality of the transmission link between BSC and BTS, or no handling is required. 2. If the alarm cannot be recovered for a long time, check step by step according to alarm items of “Interruption of communication links between OMU and BSC”. 3. If none of the measures works, contact the regional office of ZTE Corporation. Alarm type: Communication alarm 2.4.16.2Timeout of the BS environment alarm board unreported Alarm code: 0x1804 Alarm content: Timeout of the EAM unreported Alarm level: 3 Alarm cause: The direct reason is that the O&M messages of the board can not be received at the BSC side in a period. And it may be caused by blocked links and a short timer at the BSC side (the alarm will be recovered soon); or the interrupted communication link of the EAM.
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Influence of the alarm: The alarm conditions of the board can not be viewed until the alarm is recovered. Time limit of handling: Handle it as soon as possible. Handling process: 1. If the alarm is recovered soon, improve the quality of the transmission link between BSC and BTS, or no handling is required 2. If the alarm cannot be recovered for a long time, check step by step according to the alarm items of “Interruption of the EAM communication link”. 3. If there is an alarm caused by timeout of the OMU unreported, handle it before handling the alarm mentioned here. 4. If none of the measures works, contact the regional office of ZTE Corporation. Alarm type: Communication alarm
2.4.17Alarm of the 80W power amplifier (PA) 2.4.17.1Current, voltage and temperature alarms of the 80W PA Alarm code: 0x1106 Alarm content: Current, voltage and temperature alarms of the 80W PA Alarm level: 3 Alarm cause: In the BTS (V1A), the 80W PA is composed of two 40W PAs in parallel connection, then this alarm refers to the over-current, over-voltage, temperature of over 75˚C and voltage standing wave ratio alarms of the additional PA tube in the 80W PA. Influence of the alarm: This alarm indicates that the additional PA in the 80W PA is faulty or the working condition becomes poor, or the power output is affected, or lifespan of the PA is shortened. Time limit of handling: Handle it at once. Handling process: 1. Check fans of BTS and the temperature inside the equipment room.
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2. Check whether the PA output cable is connected properly. 3. Check whether the PA fuse is burnt. 4. Replace PAs in pairs. Alarm type: Equipment alarm 2.4.17.2Alarm of the consistency of two 40W PAs in terms of forward powers and types, and the standing wave ratio of the left PA Alarm code: 0x1107 Alarm content: Alarm of the consistency of two 80W PAs in terms of forward power and types, and the standing wave ratio of the left PA Alarm level: 3 Alarm cause: In BTS (V1A), the 80W PA comprises two 40W PAs in parallel connection. The alarm is caused by bad consistency of the power and phase between the two PAs in the 80W PA. Influence of the alarm: This alarm indicates that the outputs of the two PAs in the 80W PA are inconsistent, and that will cause an actual output power of less than 80W. Time limit of handling: Handle it as soon as possible. Handling process: 1. Check whether there are over-current and over-voltage alarms for the two PAs. If yes, first handle other alarms of the PA. 2. Check cables between PEU and PA. 3. Replace PAs in pairs. Alarm type: Equipment alarm
2.4.18Other alarm information 2.4.18.1Inconsistent configuration of cell parameters Alarm code: 0xA22
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Alarm content: Inconsistent configuration of cell parameters Alarm level: 3 Alarm cause: Error cell parameter configurations or inconsistent configurations of channel parameters and CU parameters Influence of the alarm: Usually the BSC background will check the data validity before synchronizing the data, and only the valid data can be synchronized, so such alarm seldom appears. However, it will cause failure of this BTS. Time limit of handling: Handle it at once. Handling process: Re-configure parameters on the background and make the parameter synchronization with the BS. Alarm type: Wrong handling. 2.4.18.2Error of parameter configuration of the carrier unit Alarm code: 0xB08 Alarm content: The CU parameter configuration error Alarm level: 3 Alarm cause: The parameter configuration of CU is wrong or inconsistent. Influence of the alarm: Usually the BSC background will check the data validity before synchronizing the data, and only the valid data can be synchronized, so such alarm seldom appears. However, it will cause conversation failure of this TRU. Time limit of handling: Handle it at once. Handling process: 1. Check whether the inserted TRU is confused. (GSM900/GSM1800/GSM1900 TRUs may be used confusedly.) 2. Check the software configuration parameters (including the frequency, mode and static power level). 3. If none of the measures works, contact the regional office of ZTE Corporation. -64-
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Alarm type: Wrong handling. 2.4.18.3Error of link parameter configuration of the BIE Alarm code: 0xD14 Alarm content: The BIE link parameter configuration error Alarm level: 3 Alarm cause: Parameter configurations or communications error Influence of the alarm: The link establishment between TRU and BSC will be abnormal. Time limit of handling: Handle it at once. Handling process: 1. Insert the board properly and reset it. 2. If this alarm persists, the BSC background data configuration is wrong. Contact the regional office of ZTE Corporation. Alarm type: Wrong handling. 2.4.18.4No response of the layer-3 software of the BS EAM Alarm code: 0xF2B Alarming content: Layer-3 software of the EAM gives no response. Alarm level: 3 Alarm cause: The OMU cannot receive L3 messages of the EAM in a certain period of time. Influence of the alarm: The OMU can monitor neither the running status of the EAM board, nor the alarms in the rack and the alarms of the external dry contact. Time limit of handling: Handle it at once Handling process: 1. Wait for 10 minutes to see whether the fault is recovered.
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2. Plug the board properly and reset it. 3. If the alarm still exists, indicating that the system clock may be abnormal, reset the CKU. 4. In case that the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm. 2.4.18.5Minor alarm of standing wave ratio of the transmitter combiner Alarm code: 0x1300 Alarm content: Minor alarm of standing wave ratio of the transmitter combiner Alarm level: 3 Alarm cause: The combiner external terminal is open circuited or of high impedance, the EAM receives interference signals or the EAM alarm line is connected improperly. Influence of the alarm: If the alarm is caused by the open circuit or high impedance of the combiner external terminal, the power output of the whole cell will be decreased, and the cell coverage will be affected, but the communication service is not affected temporarily. If the alarm is caused by the EAM receiving the interference signals, no influence will result. Time limit of handling: Handle it as soon as possible. Handling process: 1. Check whether the EAM works normally. 2. Check whether the alarm line of the backplane EAM is connected improperly. If the alarm happens together with the “major alarm of the transmitter combiner standing wave ratio”, maybe there is something wrong with the backplane alarm line. 3. If the alarm indicator on the panel lights simultaneously, it is necessary to check whether the connectors of the jumper cable on the cabinet top, main feeder and antenna are poorly contacted or there is water leakage. 4. If none of the above measures works, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm
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2.5Level 4 alarm 2.5.1Digital processor fault in the transceiver 2.5.1.1Initialization failure of digital processor 0 in the transceiver Alarm code: 0xA04 Alarm content: DSP0 initialization fails. Alarm level: 4 Alarm cause: DSP software or hardware error. Influence of the alarm: If the TRU of the DSP0 is BCCH carrier, this cell will not work normally; if it is not BCCH, two physical channels of the TRU will fail to work while others can. Time limit of handling: If the alarm influences the BCCH carrier, handle it at once; if it just influences the TCH carrier, handle it as soon as possible, otherwise the traffic capacity of this cell will be affected. Handling process: 1. Re-download the DSP software. 2. Reset this TRU frame and restart the DSP unit to see whether this alarm can be recovered. If the alarm is recovered, it means that the DSP initialization failure is caused by the external strong interference, and this TRU unit can work normally. 3. If this alarm cannot be recovered, contact the regional office of ZTE Corporation as soon as possible. Alarm type: Equipment alarm 2.5.1.2Initialization failure of digital processor 01 in the transceiver Alarm code: 0xA05 Alarm content: DSP1 initialization fails. Alarm level: 4 Alarm cause: DSP software or hardware error.
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Influence of the alarm: Two timeslots of this TRU cannot work normally, that is, two physical channels of this TRU can not be used, which will affect the traffic capacity of the cell. Time limit of handling: Handle it as soon as possible. Handling process: 1. Re-download the DSP software. 2. Reset this TRU frame and restart the DSP unit to see whether this alarm can be recovered. If the alarm is recovered, it means that the DSP initialization failure is caused by the external strong interference, and this TRU unit can work normally. 3. If this alarm cannot be recovered, contact the regional office of ZTE Corporation as soon as possible. Alarm type: Equipment alarm 2.5.1.3Initialization failure of digital processor 02 in the transceiver Alarm code: 0xA05 Alarm content: DSP2 initialization fails. Alarm level: 4 Alarm cause: DSP software or hardware error. Influence of the alarm: Two timeslots of this TRU cannot work normally, that is, two physical channels of this TRU can not be used, which will affect the traffic capacity of the cell. Time limit of handling: Handle it as soon as possible. Handling process: 1. Re-download the DSP software. 2. Reset this TRU frame and restart the DSP unit to see whether this alarm can be recovered. If the alarm is recovered, it means that the DSP initialization failure is caused by the external strong interference, and this TRU unit can work normally. 3. If this alarm cannot be recovered, contact the regional office of ZTE Corporation as soon as possible. -68-
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Alarm type: Equipment alarm 2.5.1.4Initialization failure of digital processor 03 in the transceiver Alarm code: 0xA07 Alarm content: DSP3 initialization fails. Alarm level: 4 Alarm cause: DSP software or hardware error. Influence of the alarm: Two timeslots of this TRU cannot work normally, that is, two physical channels of this TRU can not be used, which will affect the traffic capacity of the cell. Time limit of handling: Handle it as soon as possible. Handling process: 1. Re-download the DSP software. 2. Reset this TRU frame and restart the DSP unit to see whether this alarm can be recovered. If the alarm is recovered, it means that the DSP initialization failure is caused by the external strong interference, and this TRU unit can work normally. 3. If this alarm cannot be recovered, contact the regional office of ZTE Corporation as soon as possible. Alarm type: Equipment alarm 2.5.1.5Software overflow of digital processing unit 0 in the transceiver Alarm code: 0xA10 Alarm content: WatchDog of DSP0 overflows. Alarm level: 4 Alarm cause: The DSP0 program of the channel processing unit runs out of service. Influence of the alarm: The DSP0 program of the channel processing unit runs out of service, and the control unit once again implements program loading and initialization to the DSP. If the alarm cannot be recovered, it indicates that the DSP loading never succeeds. This fault may cause
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abnormal work of two channels of a carrier unit. If it is a BCCH carrier, the whole cell will fail to work normally. Time limit of handling: Handle it at once. Handling process: 1. Reset the carrier unit first to see whether this alarm can be recovered. If this alarm can be recovered, it indicates that this alarm is caused by the abnormal internal status of the DSP, and the carrier unit can work normally after resetting. 2. If this alarm cannot be recovered after resetting, contact the regional office of ZTE Corporation as soon as possible. Alarm type: Equipment alarm 2.5.1.6Software overflow of digital processing unit 1 in the transceiver Alarm code: 0xA11 Alarm content: WatchDog of DSP1 overflows. Alarm level: 4 Alarm cause: The DSP1 program of the channel processing unit runs out of service. Influence of the alarm: The DSP1 program of the channel processing unit runs out of service, and the control unit once again implements program loading and initialization to the DSP. If the alarm cannot be recovered, it indicates that the DSP loading never succeeds. This fault may cause abnormal work of two channels of a carrier unit. Time limit of handling: Handle it as soon as possible. Handling process: 1. Reset the carrier unit first to see whether this alarm can be recovered. If this alarm can be recovered, it indicates this alarm is caused by the abnormal internal status of the DSP, and the carrier unit can work normally after resetting. 2. If this alarm cannot be recovered by resetting, contact the regional office of ZTE Corporation as soon as possible.
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Alarm type: Equipment alarm 2.5.1.7Software overflow of digital processing unit 2 in the transceiver Alarm code: 0xA12 Alarm content: WatchDog of DSP2 overflows. Alarm level: 4 Alarm cause: The DSP2 program of the channel processing unit runs out of service Influence of the alarm: The DSP2 program of the channel processing unit runs out of service, and the control unit once again implements program reloading and initialization to the DSP. If the alarm cannot be recovered, it indicates that the DSP loading never succeeds. This fault may cause abnormal work of two channels of a carrier unit. Time limit of handling: Handle it as soon as possible. Handling process: 1. Reset the carrier unit first to see whether this alarm can be recovered. If this alarm can be recovered, it indicates this alarm is caused by the abnormal internal status of the DSP, and the carrier unit can work normally after resetting. 2. If this alarm cannot be recovered after resetting, contact the regional office of ZTE Corporation as soon as possible. Alarm type: Equipment alarm 2.5.1.8Software overflow of digital processing unit 3 in the transceiver Alarm code: 0xA13 Alarm content: WatchDog of DSP3 overflows. Alarm level: 4 Alarm cause: The DSP3 program of the channel processing unit runs out of service. Influence of the alarm: The DSP3 program of the channel processing unit runs out of service, and the control unit once again implements program reloading and initialization to the DSP. If the alarm cannot be recovered, it indicates that the DSP loading never succeeds. This fault may cause -71-
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abnormal work of two channels of a carrier unit. Time limit of handling: Handle it as soon as possible. Handling process: 1. Reset the carrier unit first to see whether this alarm can be recovered. If this alarm can be recovered, it indicates this alarm is caused by the abnormal internal status of the DSP, and the carrier unit can work normally after the resetting. 2. If this alarm cannot be recovered after resetting, contact the regional office of ZTE Corporation as soon as possible. Alarm type: Equipment alarm
2.5.2Check error of the uplink data from the RPP to the CHP 2.5.2.1Check error of one channel of the uplink data from the RPP to the CHP (DSP0) Alarm code: 0xA14 Alarm content: Check error of one channel of the uplink data from the RPP to the CHP (DSP0). Alarm level: 4 Alarm cause: Slight interference exists on the transmission channel between the RPP and the CHP (or the lines are poorly contacted). Influence of the alarm: No obvious influence on the system network running. Time limit of handling: Handle it as soon as possible. Handling process: 1. Check whether the CKU is properly inserted. 2. Check whether the backplane line gets loose. 3. Check whether the bit switch for the transmission matching impedance on the backplane is set properly. 4. If none of the above operations works, reset the BTS to see whether the fault will re-occur.
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5. If it is still ineffective, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.5.2.2Check error of one channel of the uplink data from the RPP to the CHP (DSP1) Alarm code: 0xA15 Alarm content: Check error of one channel of the uplink data from the RPP to the CHP (DSP1). Alarm level: 4 Alarm cause: Slight interference exists on the transmission channel between the RPP and the CHP (or the lines are poorly contacted). Influence of the alarm: No obvious influence on the system network running. Time limit of handling: Handle it as soon as possible. Handling process: 1. Check whether the CKU is properly inserted. 2. Check whether the backplane gets loose. 3. Check whether the bit switch for the transmission matching impedance on the backplane is set properly. 4. If none of the above operations works, reset the BTS to see whether the fault will re-occur. 5. If it is still ineffective, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.5.2.3Check error of one channel of the uplink data from the RPP to the CHP (DSP2) Alarm code: 0xA16 Alarm content: Check error of one channel of the uplink data from the RPP to the CHP (DSP2). Alarm level: 4 Alarm cause: Slight interference exists on the transmission channel between the RPP and the CHP (or the lines are poorly contacted). -73-
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Influence of the alarm: No obvious influence on the system network running. Time limit of handling: Handle it as soon as possible. Handling process: 1. Check whether the CKU is properly inserted. 2. Check whether the backplane gets loose. 3. Check whether the bit switch for the transmission matching impedance on the backplane is set properly. 4. If none of the above operations works, reset the BTS to see whether the fault will re-occur. 5. If it is still ineffective, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.5.2.4Check error of one channel of the uplink data from the RPP to the CHP (DSP3) Alarm code: 0xA17 Alarm content: Check error of one channel of the uplink data from the RPP to the CHP (DSP3). Alarm level: 4 Alarm cause: Slight interference exists on the transmission channel between the RPP and the CHP (or the lines are poorly contacted). Influence of the alarm: No obvious influence on the system network running. Time limit of handling: Handle it as soon as possible. Handling process: 1. Check whether the CKU is properly inserted. 2. Check whether the backplane gets loose. 3. Check whether the bit switch for the transmission matching impedance on the backplane is set properly. 4. If none of the above operations works, reset the BTS to see whether the fault will re-occur. -74-
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5. If it is still ineffective, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm
2.5.3Cross-threshold of the flash memory programming times in the frame unit controller Alarm code: 0xA19 Alarm content: Cross-threshold of the FLASH MEMORY programming times in the FUC. Alarm level: 4 Alarm cause: Too many times of the FLASH MEMORY programming or hardware error. Influence of the alarm: The baseband processing unit may fail to operate FLASH or the stored software and data is lost. Time limit of handling: Handle it as soon as possible. Handling flow: Replace the equipment. As the FLASH programming threshold is set as 10,000 times, while the maximum of the FLASH programming times is up to 100,000, generally such alarm seldom occurs. Alarm type: Equipment alarm
2.5.4Channel parameter configuration error 2.5.4.1Channel 0 parameter configuration error Alarm code: 0xA1A Alarm content: The Ch0 parameter configuration error Alarm level: 4 Alarm cause: The parameter configuration is improper or with conflicts. Influence of the alarm: Usually the BSC background will check the data validity before synchronizing the data, and only the valid data can be synchronized, so such alarm seldom occurs.. This alarm will affect the channel assignment and normal work. Time limit of handling: Handle it at once.
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Handling process: Re-configure the parameters on the background and make the parameter synchronized with the BS. Alarm type: Wrong handling. 2.5.4.2Channel 1 parameter configuration error Alarm code: 0xA1B Alarm content: The Ch1 parameter configuration error Alarm level: 4 Alarm cause: The parameter configuration is improper or with conflicts. Influence of the alarm: Usually the BSC background will check the data validity before synchronizing the data, and only the valid data can be synchronized, so such alarm seldom occurs. This alarm will affect the channel assignment and normal work. Time limit of handling: Handle it at once. Handling process: Re-configure the parameters on the background and make the parameters synchronized with the BS. Alarm type: Wrong handling. 2.5.4.3Channel 2 parameter configuration error Alarm code: 0xA1C Alarm content: The Ch2 parameter configuration error Alarm level: 4 Alarm cause: The parameter configuration is improper or with conflicts. Influence of the alarm: Usually the BSC background will check the data validity before synchronizing the data, and only the valid data can be synchronized, so such alarm seldom occurs. This alarm will affect the channel assignment and normal work. Time limit of handling: Handle it at once. Handling process: Re-configure the parameters on the background and make the parameters
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synchronized with the BS. Alarm type: Wrong handling. 2.5.4.4Channel 3 parameter configuration error Alarm code: 0xA1D Alarm content: The Ch3 parameter configuration error Alarm level: 4 Alarm cause: The parameter configuration is improper or with conflicts. Influence of the alarm: Usually the BSC background will check the data validity before synchronizing the data, and only the valid data can be synchronized, so such alarm seldom occurs. This alarm will affect the channel assignment and normal work. Time limit of handling: Handle it at once. Handling process: Re-configure the parameters on the background and make the parameters synchronized with the BS. Alarm type: Wrong handling. 2.5.4.5Channel 4 parameter configuration error Alarm code: 0xA1E Alarm content: The Ch4 parameter configuration error Alarm level: 4 Alarm cause: The parameter configuration is improper or with conflicts. Influence of the alarm: Usually the BSC background will check the data validity before synchronizing the data, and only the valid data can be synchronized, so such alarm seldom occurs. This alarm will affect the channel assignment and normal work. Time limit of handling: Handle it at once. Handling process: Re-configure the parameters on the background and make the parameters synchronized with the BS.
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Alarm type: Wrong handling. 2.5.4.6Channel 5 parameter configuration error Alarm code: 0xA1F Alarm content: The Ch5 parameter configuration error Alarm level: 4 Influence of the alarm: It will influence the channel assignment and normal work. Alarm cause: The parameter configuration is improper or with conflicts. Influence of the alarm: Usually the BSC background will check the data validity before synchronizing the data, and only the valid data can be synchronized, so such alarm seldom occurs. This alarm will affect the channel assignment and normal work. Time limit of handling: Handle it at once. Handling process: Re-configure the parameters on the background and make the parameters synchronized with the BS. Alarm type: Wrong handling. 2.5.4.7Channel 6 parameter configuration error Alarm code: 0xA20 Alarm content: The Ch6 parameter configuration error Alarm level: 4 Alarm cause: The parameter configuration is improper or with conflicts. Influence of the alarm: Usually the BSC background will check the data validity before synchronizing the data, and only the valid data can be synchronized, so such alarm seldom occurs. This alarm will affect the channel assignment and normal work. Time limit of handling: Handle it at once. Handling process: Re-configure the parameters on the background and make the parameters synchronized with the BS.
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Alarm type: Wrong handling. 2.5.4.8Channel 7 parameter configuration error Alarm code: 0xA21 Alarm content: The Ch7 parameter configuration error Alarm level: 4 Alarm cause: The parameter configuration is improper or with conflicts. Influence of the alarm: Usually the BSC background will check the data validity before synchronizing the data, and only the valid data can be synchronized, so such alarm seldom occurs. This alarm will affect the channel assignment and normal work. Time limit of handling: Handle it at once. Handling process: Re-configure the parameters on the background and make the parameters synchronized with the BS. Alarm type: Wrong handling.
2.5.5Out-of-lock of receiving RF self oscillator 2.5.5.1Out-of-lock of receiving RF self oscillator 1 Alarm code: 0xB02 Alarm content: Out-of-lock of receiving RF self oscillator 1 Alarm level: 4 Alarm cause: The clock signals are not stable or the TRU phrase-locked loop is faulty Influence of the alarm: This TRU may not be available for conversation. Time limit of handling: Handle it at once. Handling process: Replace the TRU. Alarm type: Equipment alarm
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2.5.5.2Out-of-lock of receiving RF self oscillator 2 Alarm code: 0xB03 Alarm content: Out-of-lock of receiving RF self oscillator 2 Alarm level: 4 Alarm cause: The clock signals are not stable or the TRU phrase-locked loop is faulty Influence of the alarm: This TRU may not be available for conversation. Time limit of handling: Handle it at once. Handling process: Replace the TRU. Alarm type: Equipment alarm 2.5.5.3Out-of-lock of receiving IF self oscillator 6 Alarm code: 0xB07 Alarm content: Out-of-lock of receiving IF self oscillator 6 Alarm level: 4 Alarm cause: Unstable clock signal or TRU phrase-locked loop fault Influence of the alarm: This TRU may not be available for conversation. Time limit of handling: Handle it at once. Handling process: Replace the TRU. Alarm type: Equipment alarm
2.5.6Alarm for out-of-lock of the phase-locked loop of the BS CKU Alarm code: 0xC08 Alarm content: Alarm for out-of-lock of the CKU phase-locked loop Alarm level: 4
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Alarm cause: This alarm occurs only in the condition of the whole network synchronization, it may be caused by the unstable CKU clock source or the CKU phase-locked loop fault. Influence of the alarm: Basically this BS can work normally, while the slide code alarm and out-offrame alarm may occur. Time limit of handling: Put it off. Handling process: 1. Maybe the current 8K clock jitters quite sharply, observe for a certain period of time. If the out-oflock alarm occurs repeatedly for one day, replace the board. 2. If all the boards give alarms, it indicates a poor line, switch over to the free-oscillation mode. 3. If none of the above measures works, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm
2.5.7No response of layer-3 software 2.5.7.1No response of layer-3 software of the BS CKU Alarm code: 0xC0D Alarming content: The CKU layer-3 software gives no response temporarily. Alarm level: 4 Alarm cause: The OMU cannot receive CKU L3 messages in a certain period of time. Influence of the alarm: This BS can work normally but is unable to be maintained and monitored. Time limit of handling: Handle it as soon as possible. Handling process: 1. Wait for 10 minutes to see whether the alarm is recovered. 2. If not, change the alarming board as a standby board and reset the CKU. 3. If the alarm still exists after resetting, replace the board. Alarm type: Equipment alarm -81-
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2.5.7.2No response of layer-3 software of the BS BIE Alarm code: 0xD15 Alarming content: The layer-3 software of the BIE gives no response temporarily. Alarm level: 4 Alarm cause: The OMU cannot receive the BIE L3 messages in a certain period of time. Influence of the alarm: The OMU fails to monitor the BIE running temporarily, but the system service running will not be influenced. Time limit of handling: Handle it as soon as possible. Handling process: 1. Wait for 10 minutes to see whether the fault is cleared. 2. Insert the board properly and reset it. 3. If the alarm still exists, it indicates the system clock may be abnormal, then reset the CKU. 4. In case that the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Communication alarm 2.5.7.3No response of the layer-3 software of the carrier unit (CU) Alarm code: 0xB10 Alarming content: The layer-3 software of the CU gives no response temporarily. Alarm level: 4 Alarm cause: The OMU cannot receive the CU L3 messages in a certain period of time. Influence of the alarm: It will affect the maintenance on CU, but with no influence on the phone calls. Time limit of handling: No immediate handling is required. Handling process:
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1. Wait for 10 minutes to see whether the alarm is recovered. 2. Reset the TRU, and view whether the alarm exists. 3. If the alarm still exists after resetting, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm
2.5.8Slide code indication of the BIE E1 interface signal 2.5.8.1Forward slide code indication of the BIE E1 interface signal 1 Alarm code: 0xD0B Alarm content: Forward slide code indication of the BIE E1 interface signal 1 Alarm level: 4 Alarm cause: Chips faulty or clocks abnormal, phase difference from the BSC clock or poor E1 connection Influence of the alarm: For occasional occurrence, it has little influence on the conversation. Frequent occurrences (once several minutes) will cause abnormal communication or abnormal link set-up between the active rack TRU and the BSC. Time limit of handling: If it occurs occasionally, and the CKU is in the free run mode, this alarm may not be handled; while for frequent occurrences, handle it as soon as possible. Handling process: 1. Insert the board properly and reset it. 2. If the alarm still exists, it indicates that the D101 chip on the board may be faulty, replace the board. 3. If the alarm still exists, it indicates the system clock may be abnormal, reset the CKU. 4. If the alarm still exists, the physical link of the E1 A interface may be abnormal. 5. If the physical link of the E1 A interface is normal, while the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm
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2.5.8.2Forward slide code indication of the BIE E1 interface signal 2 Alarm code: 0xD0C Alarm content: Forward slide code indication of the BIE E1 interface signal 2 Alarm level: 4 Alarm cause: Chips faulty or clocks abnormal, phase difference from the BSC clock or poor E1 connection Influence of the alarm: For occasional occurrence, it has little influence on the conversation. Frequent occurrences (once several minutes) will cause abnormal communication or abnormal link set-up between the extension rack TRU and the BSC. Time limit of handling: If it occurs occasionally, and the CKU is in the free run mode, this alarm may not be handled; while for frequent occurrences, handle it as soon as possible. Handling process: 1. Insert the board properly and reset it. 2. If the alarm still exists, it indicates that the D201 chip on the board may be faulty, replace the board. 3. If the alarm still exists, it indicates the system clock may be abnormal, reset the CKU. 4. If the alarm still exists, the physical link of the E1 B interface may be abnormal. 5. If the physical link of the E1 B interface is normal, while the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.5.8.3Forward slide code indication of the BIE E1 interface signal 3 Alarm code: 0xD0D Alarm content: Forward slide code indication of the BIE E1 interface signal 3 Alarm level: 4 Alarm cause: Chips faulty or clocks abnormal, phase difference from the BSC clock or poor E1
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connection Influence of the alarm: For occasional occurrence, it has little influence on the conversation. Frequent occurrences (once several minutes) will cause abnormal communication or abnormal link set-up between the cascaded rack TRU and the BSC. Time limit of handling: If it occurs occasionally, and the CKU is in the free run mode, this alarm may not be handled; while for frequent occurrences, handle it as soon as possible. Handling process: 1. Insert the board properly and reset it. 2. If the alarm still exists, it indicates that the D301 chip on the board may be faulty, replace the board. 3. If the alarm still exists, it indicates the system clock may be abnormal, reset the CKU. 4. If the alarm still exists, the physical link of the E1 C interface may be abnormal. 5. If the physical link of the E1 C interface is normal, while the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.5.8.4Backward slide code indication of the BIE E1 interface signal 1 Alarm code: 0xD0E Alarm content: Backward slide code indication of the BIE E1 interface signal 1 Alarm level: 4 Alarm cause: Chips faulty or clocks abnormal, phase difference from the BSC clock or poor E1 connection Influence of the alarm: For occasional occurrence, it has little influence on the communication. Frequent occurrences (once several minutes) will cause abnormal communication or abnormal link set-up between the host rack TRU and the BSC. Time limit of handling: If it occurs occasionally, and the CKU is in the free run mode, this alarm may not be handled; while for frequent occurrences, handle it as soon as possible.
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Handling process: 1. Insert the board properly and reset it. 2. If the alarm still exists, it indicates that the D101 chip on the board may be faulty, replace the board. 3. If the alarm still exists, it indicates the system clock may be abnormal, reset the CKU. 4. If the alarm still exists, the physical link of the E1 A interface may be abnormal. 5. If the physical link of the E1 A interface is normal, and the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.5.8.5Backward slide code indication of the BIE E1 interface signal 2 Alarm code: 0xD0F Alarm content: Backward slide code indication of the BIE E1 interface signal 2 Alarm level: 4 Alarm cause: Chips faulty or clocks abnormal, phase difference from the BSC clock or poor E1 connection Influence of the alarm: For occasional occurrence, it has little influence on the communication. Frequent occurrences (once several minutes) will cause abnormal communication or abnormal link set-up between the extension rack TRU and the BSC. Time limit of handling: If it occurs occasionally, and the CKU is in the free run mode, this alarm may not be handled; while for frequent occurrences, handle it as soon as possible. Handling process: 1. Insert the board properly and reset it. 2. If the alarm still exists, it indicates that the D201 chip on the board may be faulty, replace the board. 3. If the alarm still exists, it indicates the system clock may be abnormal, reset the CKU.
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4. If the alarm still exists, the physical link of the E1 B interface may be abnormal. 5. If the physical link of the E1 B interface is normal, while the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm 2.5.8.6Backward slide code indication of the BIE E1 interface signal 3 Alarm code: 0xD10 Alarm content: Backward slide code indication of the BIE E1 interface signal 3 Alarm level: 4 Alarm cause: Chips faulty or clocks abnormal, phase difference from the BSC clock or poor E1 connection Influence of the alarm: For occasional occurrence, it has little influence on the communication. Frequent occurrences (once several minutes) will cause abnormal communication or abnormal link set-up between the cascaded rack TRU and the BSC. Time limit of handling: If it occurs occasionally, and the CKU is in the free run mode, this alarm may not be handled; while for frequent occurrences, handle it as soon as possible. Handling process: 1. Insert the board properly and reset it. 2. If the alarm still exists, it indicates that the D301 chip on the board may be faulty, replace the board. 3. If the alarm still exists, it indicates the system clock may be abnormal, reset the CKU. 4. If the alarm still exists, the physical link of the E1 C interface may be abnormal. 5. If the physical link of the E1 C interface is normal, while the alarm still exists, contact the regional office of ZTE Corporation. Alarm type: Equipment alarm
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Maintenance Manual for ZXG10-BTS (V1A)
2.5.9BS OMU fault 2.5.9.1Cross-threshold of the flash memory programming times of the BS OMU Alarm code: 0x1000 Alarm content: Cross-threshold of the OMU FLASH programming times. Alarm level: 4 Alarm cause: Too many times of FLASH programming, read-write error or the software checksum error. Influence of the alarm: No influence on the current work. Time limit of handling: Handle it as soon as possible. Handling process: 1. Reset the OMU first to see whether this alarm can be recovered. If the alarm can be recovered, it is caused by the external interference which causes the CPU to read the data in the FLASH MEMORY 2. If resetting cannot recover this alarm, it indicates the board is aging, replace this board. Alarm type: Equipment alarm 2.5.9.2Failure of flash memory programming of the BS OMU Alarm code: 0x1001 Alarm content: The OMU FLASH programming fails. Alarm level: 4 Alarm cause: Too many times of the FLASH programming or read-write error. Influence of the alarm: Loading and reading any version fails. Time limit of handling: Handle it at once. Handling process: Users can not solve such kinds of problems, usually this alarm is caused by FLASH chip fault. For such faults, contact the regional office of ZTE Corporation.
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Chapter 2 Alarm Handling
Alarm type: Equipment alarm 2.5.9.3The standby board of the BS OMU not in position Alarm code: 0x1004 Alarm content: The OMU standby board is off position. Alarm level: 4 Alarm cause: The OMU standby board is not powered on or communication with the active board is improper. Influence of the alarm: Hand-over to the standby board fails when the active board is faulty, thus reducing the system reliability. Time limit of handling: Handle it as soon as possible. Handling process: 1. Check whether the standby board is on the rack, then reset or re-insert it (when the standby board is in the normal status, the power indicator and running indicator are normally on) 2. If there is no standby board on the rack, add an OMU board. Alarm type: Wrong handling.
2.5.10Minor alarm of PA over-temperature Alarm code: 0x1104 Alarm content: Minor alarm of PA over-temperature (>=75ºC) Alarm level: 4 Alarm cause: PA temperature is too high, which may result from its long-time full-power operation, with the fan long-time switched off, high temperature of the environment and the detecting circuit fault. Influence of the alarm: This TRU can work, but the PA is aging rapidly. Time limit of handling: Handle it as soon as possible.
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Maintenance Manual for ZXG10-BTS (V1A)
Handling process: 1. Check whether the fans work normally and whether the temperature of the environment is too high. 2. If the fans work normally and the environment temperature is normal, while the PA overtemperature alarm still exists, maybe the detecting circuit is faulty, replace the PA. Alarm type: Equipment alarm
2.5.11Board communication interruption 2.5.11.1Communication interruption of the frame unit Alarm code: 0x1705 Alarm content: The FU communication interruption. Alarm level: 4 Alarm cause: the HDLC link between the OMU and FU is disconnected. Influence of the alarm: Fault occurs to FU polling, and no data can be transmitted between the FU and OMU. The FU data cannot be configured, and the FU status cannot be reported. Time limit of handling: Handle it as soon as possible. Handling process: The system can keep on running, but no data can be configured. If only the FU link is disconnected for a long time, the user may try the following methods for troubleshooting. 1. Check whether the FU board is inserted properly. 2. Reset the FU board to see whether the alarm is recovered. 3. Check whether the CKU works normally. 4. Check whether the address switch on the backplane is set correctly. 5. Check whether the O&M line of the backplane is properly connected. 6. If the problem still can not be solved, please contact the regional office of ZTE Corporation. Alarm type: Communication alarm
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Chapter 2 Alarm Handling
2.5.11.2Communication link disconnection of the carrier unit (CU) Alarm code: 0x1706 Alarm content: CU communication link disconnection Alarm level: 4 Alarm cause: the HDLC link between the OMU and CU is disconnected. Influence of the alarm: Fault occurs to the CU polling, and no data can be transmitted between the CU and OMU. The CU data cannot be configured, and the CU status cannot be reported. Time limit of handling: Handle it as soon as possible. Handling process: The system can keep on running, but no data can be configured. If only the CU link is disconnected for a long time, the user may try the following methods for troubleshooting. 1. Check whether the CU board is inserted properly. 2. Reset the CU board to see whether the alarm is recovered. 3. Check whether the CKU works normally. 4. Check whether the address switch on the backplane is set correctly. 5. Check whether the O&M line of the backplane is properly connected. 6. If the problem still can not be solved, please contact the regional office of ZTE Corporation. Alarm type: Communication alarm 2.5.11.3Communication link disconnection of the power board of the carrier shelf Alarm code: 0x1709 Alarm content: PSB communication link disconnection. Alarm level: 4 Alarm cause: EAM power-off, off-line or faulty; OMU power-off, off-line or faulty. Influence of the alarm: it will influence the PSB operation and maintenance.
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Maintenance Manual for ZXG10-BTS (V1A)
Time limit of handling: Handle it as soon as possible. Handling process: 1. Check whether there are alarms and faults in the OMU and EAM. If yes, eliminate the faults accordingly. 2. If both the OMU and EAM work normally, check whether the alarm line of the backplane is properly connected. For anything abnormal, correct it. 3. If the fault still exists, replace the board and contact the regional office of ZTE Corporation. Alarm type: Communication alarm 2.5.11.4Communication link disconnection of the PA Alarm code: 0x170A Alarm content: Communication link disconnection of the PA. Alarm level: 4 Alarm cause: The corresponding TRU power-off, off-line or faulty; and OMU power-off, off-line or faulty. Influence of the alarm: it will influence the PA operation and maintenance. Time limit of handling: Handle it as soon as possible. Handling process: 1. Check whether there are alarms and faults in the OMU and TRU (especially the CUI) corresponding to the PA. If yes, eliminate the faults accordingly. 2. If both the OMU and CUI work normally, check whether the O&M line of the backplane is properly connected. For anything abnormal, correct it. 3. If the fault still exists, replace the board and contact the regional office of ZTE Corporation. Alarm type: Communication alarm
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Chapter 2 Alarm Handling
2.5.11.5Communication link disconnection of the multi-coupler Alarm code: 0x170B Alarm content: MUL communication link disconnection Alarm level: 4 Alarm cause: EAM power-off, off-line or faulty; OMU power-off, off-line or faulty. Influence of the alarm: it only influences the MUL operation and maintenance. Time limit of handling: Handle it as soon as possible. Handling process: 1. Check whether there are alarms and faults in the OMU and EAM. If yes, eliminate the faults accordingly. 2. If both the OMU and EAM work normally, check whether the alarm line of the backplane is properly connected. For anything abnormal, correct it. 3. If the fault still exists, replace the board and contact the regional office of ZTE Corporation. Alarm type: Communication alarm 2.5.11.6Communication link disconnection of the combiner Alarm code: 0x170D Alarm content: HYCOM communication link disconnection. Alarm level: 4 Alarm cause: EAM power-off, off-line or faulty; OMU power-off, off-line or faulty. Influence of the alarm: it only influences the HYCOM operation and maintenance. Time limit of handling: Handle it at once. Handling process: 1. Check whether there are alarms and faults in the OMU and EAM. If yes, eliminate the faults accordingly. -93-
Maintenance Manual for ZXG10-BTS (V1A)
2. If both the OMU and EAM work normally, check whether the alarm line of the backplane is properly connected. For anything abnormal, correct it. 3. If the fault still exists, replace the board and contact the regional office of ZTE Corporation. Alarm type: Communication alarm
2.5.12 Boards are unreported till timeout 2.5.12.1 The BS interface board is unreported till timeout Alarm code: 0x1802 Alarm content: the BIE board is not reported till timeout Alarm level: 4 Alarm reason: The direct reason is that the BSC side cannot receive O&M messages of the board in a certain period of time. The possible causes include: the link is blocked while the timer at the BSC side is set to a relatively short duration (the alarm will be recovered very soon); the BIE communication link is disconnected. Influence of the alarm: The alarm condition of the board can not be viewed until the alarm is recovered. Time limit of handling: Handle it as soon as possible. Handling process: 1. If the alarm is recovered very quickly, improve the quality of the transmission link between the BSC and BTS, or no handling is required. 2. If the alarm is not recovered for a long time, check step by step according to the “BIE communication link disconnected” alarm item. 3. Check whether there is an alarm of timeout of the OMU unreported. If yes, handle it first before handling this alarm. 4. If none of the measures works, contact the regional office of ZTE Corporation. Alarm type: Communication alarm
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Chapter 2 Alarm Handling
2.5.12.2 The BS CKU is unreported till timeout Alarm code: 0x1803 Alarm content: the CKU is unreported till timeout Alarm level: 4 Alarm reason: The direct reason is that the BSC side cannot receive O&M messages of the board in a certain period of time. The possible causes include: the link is blocked and the timer at the BSC side is set to a relatively short duration (the alarm will be recovered very soon); the CKU communication link is disconnected. Influence of the alarm: The alarm condition of the board can not be viewed until the alarm is recovered. Time limit of handling: Handle it as soon as possible. Handling process: 1. If the alarm is recovered very quickly, improve the quality of the transmission link between the BSC and BTS, or no handling is required. 2. If the alarm is not recovered for a long time, check step by step according to the “CKU communication link disconnected” alarm item. 3. Check whether there is the alarm of timeout of the OMU unreported. If yes, handle it first before handling this alarm. 4. If none of the measures works, contact the regional office of ZTE Corporation. Alarm type: Communication alarm 2.5.12.3 The frame unit is unreported till timeout Alarm code: 0x1805 Alarm content: the FU board is not reported till timeout Alarm level: 4 Alarm cause: The direct cause is that the O&M messages of the board can not be received on BSC side in a certain period of time. Possible causes: the link is blocked and the timer on the BSC side is -95-
Maintenance Manual for ZXG10-BTS (V1A)
set to a relatively short duration (the alarm will be recovered very soon); FU communication link is disconnected. Influence of the alarm: The alarm condition of the board can not be viewed until the alarm is recovered. Time limit of handling: handle it as soon as possible. Handling process: 1. If the alarm is recovered very quickly, improve the quality of the transmission link between BSC and BTS, or no handling is required. 2. If the alarm is not recovered for a long time, check step by step according to the “FU communication link disconnected” alarm item. 3. Check whether there is the alarm of timeout of OMU unreported, if yes, handle it first before handling this alarm. 4. If none of the measures works, contact the regional office of ZTE Corporation. Alarm type: Communication alarm 2.5.12.4 The carrier unit is unreported till timeout Alarm code: 0x1806 Alarm content: the CU board is not reported till timeout Alarm level: 4 Alarm cause: The direct cause is that the O&M messages of the board can not be received on BSC side in a certain period of time. The possible causes: the link is blocked and the timer on the BSC side is set to a relatively short duration (the alarm will be recovered very soon); CU communication link is disconnected. Influence of the alarm: The alarm condition of the board can not be viewed until the alarm is recovered. Time limit of handling: handle it as soon as possible. Handling process:
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Chapter 2 Alarm Handling
1. If the alarm is recovered very quickly, improve the quality of the transmission link between BSC and BTS, or no handling is required. 2. If the alarm is not recovered for a long time, check step by step according to the “CU communication link disconnected” alarm item. 3. Check whether there is the alarm of timeout of OMU unreported, if yes, handle it first before handling this alarm. 4. If none of the above measures works, contact the regional office of ZTE Corporation. Alarm type: Communication alarm 2.5.12.5 The power board of the public shelf is unreported till timeout Alarm code: 0x1808 Alarm content: The PSA board is not reported till timeout Alarm level: 4 Alarm cause: The direct cause is that the O&M messages of the board can not be received on the BSC side in a certain period of time. The possible causes: the link is blocked and the timer on the BSC side is set to a relatively short duration (the alarm will be recovered very soon); PSA communication link is disconnected. Influence of the alarm: The alarm condition of the board can not be viewed until the alarm is recovered. Time limit of handling: Handle it as soon as possible. Handling process: 1. If the alarm is recovered very quickly, improve the quality of the transmission link between BSC and BTS, or no handling is required. 2. If the alarm is not recovered for a long time, check step by step according to the “PSA communication link disconnected” alarm item. 3. Check whether there is the alarm of timeout of OMU unreported, if yes, handle it first before handling this alarm.
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Maintenance Manual for ZXG10-BTS (V1A)
4. If none of the above measures works, contact the regional office of ZTE Corporation. Alarm type: Communication alarm 2.5.12.6 The power board of the carrier shelf power board is unreported till timeout Alarm code: 0x1809 Alarm content: The PSB board is not reported till timeout Alarm level: 4 Alarm cause: The direct cause is that the O&M messages of the board can not be received on BSC side in a certain period of time. The possible causes: the link is blocked and the timer on the BSC side is set to a relatively short duration (the alarm will be recovered very soon); PSB communication link is disconnected. Influence of the alarm: The alarm condition of the board can not be viewed until the alarm is recovered. Time limit of handling: Handle it as soon as possible. Handling process: 1. If the alarm is recovered very quickly, improve the quality of the transmission link between BSC and BTS, or no handling is required. 2. If the alarm is not recovered for a long time, check step by step according to the “PSB communication link disconnected” alarm item. 3. Check whether there is the alarm of timeout of OMU unreported, if yes, handle it first before handling this alarm. 4. If none of the above measures works, contact the regional office of ZTE Corporation. Alarm type: Communication alarm 2.5.12.7 The power amplifier is unreported till timeout Alarm code: 0x180A Alarm content: Timeout of the PA board is not reported
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Chapter 2 Alarm Handling
Alarm level: 4 Alarm cause: The direct cause is that the O&M messages of the board can not be received on BSC side in a certain period of time. The possible causes: the link is blocked and the timer on the BSC side is set to a relatively short duration (the alarm will be recovered very soon); PA communication link is disconnected. Influence of the alarm: The alarm condition of the board can not be viewed until the alarm is recovered. Time limit of handling: Handle it as soon as possible. Handling process: 1. If the alarm is recovered very quickly, improve the quality of the transmission link between BSC and BTS, or no handling is required. 2. If the alarm is not recovered for a long time, check step by step according to the “PA communication link disconnected” alarm item. 3.Check whether there is the alarm that OMU is unreported till timeout, if yes, handle it first before handling this alarm. . 4. If none of the above measures works, contact the regional office of ZTE Corporation. Alarm type: Communication alarm 2.5.12.8 The multi-coupler is unreported till timeout Alarm code: 0x180B Alarm content: The MUL board is not reported till timeout Alarm level: 4 Alarm cause: The direct cause is that the O&M messages of the board can not be received on BSC side in a certain period of time. The possible causes: the link is blocked and the timer on the BSC side is set to a relatively short duration (the alarm will be recovered very soon); MUL communication link is disconnected. Influence of the alarm: The alarm condition of the board can not be viewed until the alarm is recovered.
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Maintenance Manual for ZXG10-BTS (V1A)
Time limit of handling: Handle it as soon as possible. Handling process: 1. If the alarm is recovered very quickly, improve the quality of the transmission link between BSC and BTS, or no handling is required. 2. If the alarm is not recovered for a long time, check step by step according to the “MUL communication link disconnected” alarm item. 3. Check whether there is the alarm of timeout of OMU unreported, if yes, handle it first before handling this alarm. 4. If none of the above measures works, contact the regional office of ZTE Corporation. Alarm type: Communication alarm 2.5.12.9 The hybrid combiner is unreported till timeout Alarm code: 0x180D Alarm content: The HYCOM board is not reported till timeout Alarm level: 4 Alarm cause: The direct cause is that the O&M messages of the board can not be received on BSC side in a certain period of time. The possible causes: the link is blocked and the timer on the BSC side is set to a relatively short duration (the alarm will be recovered very soon); HYCOM communication link is disconnected. Influence of the alarm: The alarm condition of the board can not be viewed until the alarm is recovered. Time limit of handling: Handle it as soon as possible. Handling process: 1. If the alarm is recovered very quickly, improve the quality of the transmission link between BSC and BTS, or no handling is required. 2. If the alarm is not recovered for a long time, check step by step according to the “HYCOM communication link disconnected” alarm item.
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Chapter 2 Alarm Handling
3. Check whether there is the alarm of timeout of OMU unreported, if yes, handle it first before handling this alarm. 4. If none of the above measures works, contact the regional office of ZTE Corporation. Alarm type: Communication alarm
2.5.1380W PA link alarm Alarm code: 0x1108 Alarm content: 80W PA link alarm Alarm level: 4 Alarm cause: In BTS (V1A), 80W PA comprises two 40W PAs in parallel. The alarm is caused by the communication link disconnection of the additional PA of the 80W PA. Influence of the alarm: Occurrence of this alarm will cause the actual output power to be much less than 80W. Time limit of handling: Handle it as soon as possible. Handling process: 1. Check whether the DAAU board works properly. 2. Check whether the PA is in position. Alarm type: Equipment alarm
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3 Running Information Processing 3.1Classification of running information The running information of ZXG10-BTS (V1A) mainly comes from the panel indicators of OMU, TRU and other modules. Flashing of the indicators means differently, from which the running status of the equipment can be determined. 1. OMU There are four indicators on the OMU panel, which, from top downwards, are power supply indicator, alarm indicator, running indicator, and active/standby indicator. The meanings of the combination statuses of the panel indicators are shown in Table 3-1. Table 3-1 Names and meanings of the OMU indicators Running
Power supply
Alarm
indicator (green)
indicator (red)
The board not powered on
Normally off
Normally off
Normally off
Normally off
The board powered on
Normally on
X
X
X
BOOT starting
Normally on
Normally off
4 Hz flashing
Normally off
Active status
Normally on
X
X
Normally on
Standby status
Normally on
X
X
Normally off
Process initially started
Normally on
Normally on
Normally on
Normally on
Normally on
Normally on
1 Hz flashing
X
Normally on
1 Hz flashing
1 Hz flashing
Normally on
Normally on
4 Hz flashing
4 Hz flashing
Normally on
Normally on
1 Hz flashing
4 Hz flashing
Normally on
Indicated status
Fault of the 4M or 8K clock LAPD link disconnected System initialization status File downloading
Note: X means “the indicator can be in any status”. 2. TRU
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indicator (green)
Active/stand by (yellow)
Chapter 3 Running Information Processing
There are five indicators on the TRU board, i.e., power supply indicator, alarm indicator, running indicator, status indicator ST1 and status indicator ST2 from top downwards. Meanings of combinations of the panel indicators are shown in Table 3-2. Table 3-2 Names and meanings of the TRU indicators Indicated status
Power supply
Alarm
Running
Status
Status
indicator (green)
indicator
indicator
indicator
indicator
(red)
(green)
ST1
ST2
The board not powered on
Normally off
X
X
X
X
The board powered on
Normally on
X
X
X
X
BOOT starting
Normally on
Normally
4Hz flash
X
X
Normally on
X
X
1Hz flashing
X
X
off Process initially started
Normally on
Normally on
Fault of 4M or 8K clock
Normally on
Normally on
LAPD link disconnected
Normally on
1Hz flash
1Hz flashing
X
X
HDLC link disconnected
Normally on
4Hz flash
1Hz flash
X
X
System initialization status
Normally on
4Hz
4Hz flashing
X
X
4Hz flashing
X
X
X
Normally
X
flashing File downloading
Normally on
1Hz flashing
BCCH TRU (the system
X
message already received)
X
on
Note: 1) X means “the indicator can be in any status ”. 2) The priority sequence of the indicators in working status is shown as follows: the priority gradually decreases from top downwards, i.e., “fault of 4M or 8K clock ----LAPD link disconnected ----HDLC link disconnected ----file downloading ----system initialization status” 3) ST1: Status indicator 1.If it is normally on, it means that this TRU is the carrier shelf where the BCCH channel is located. If it is normally off, it means that this TRU is the carrier shelf where the non-BCCH channel is located. 4) ST2: Status indicator 2.It is reserved in design, and not used in actual running.
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3. BIE There are four indicators on the BIE panel, i.e., power supply indicator, alarm indicator, running indicator, and active/standby indicator from top downwards. Meanings of combinations of the panel indicators are shown in Table 3-3. Table 3-3 Names and meanings of the BIE indicators Indicated status
Power supply indicator (green)
Alarm indicator (red)
Running indicator (green)
Active/standby (yellow)
The board not powered on
Normally off
Normally off
Normally off
Normally off
The program out of service
Normally on
X
Normally on
X
HDLC link not established
Normally on
1Hz flashing
1Hz flash
X
Working normally
Normally on
Normally off
1Hz flash
X
Active
Normally on
X
X
Normally on
Note: X means “the indicator can be in any status.” 4. EBIE There are four indicators on the EBIE panel, which are, in turn from the top down, power supply indicator, alarm indicator, running indicator and active/standby indicator. Meanings of combinations of the panel indicators are shown in Table 3-4 Table 3-4 Names and meanings of the EBIE indicators Indicated status
Power supply indicator (green)
Alarm indicator (red)
Running indicator (green)
Active/standby (yellow)
The board not powered on
Normally off
Normally off
Normally off
Normally off
The program out of service
Normally on
X
Normally on
X
8K E1 alarm
Normally on
Normally on
1Hz flashing
X
HDLC link not established
Normally on
4Hz flashing
1Hz flash
X
Working normally
Normally on
Normally off
1Hz flashing
X
Active
Normally on
X
X
Normally on
Parameter configuration
Normally on
4Hz flashing
4Hz flashing
X
Note: X means “the indicator can be in any status”.
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Chapter 3 Running Information Processing
5. CKU There are five indicators on the CKU board, i.e., power supply indicator, alarm indicator, running indicator, active/standby indicator and phase lock indicator from top downwards. Meanings of combinations of the panel indicators are shown in Table 3-5. Table 3-5 Names and meanings of the CKU indicators Indicated status
Power supply indicator (green)
Alarm indicator
Running indicator (green)
Active/stan dby (yellow)
Phase lock indicator (green)
(red)
The board is not powered on
Normally off
Normally off
Normally off
Normally off
Normally off
Initialization
Normally on
4Hz flash
X
X
X
The program runs out of service
Normally on
X
Normally on
X
X
Working normally
Normally on
Normally off
1Hz flash
X
X
Active
Normally on
X
X
Normally on
X
Phase lock status
Normally on
X
X
X
4Hz flashing
Locked status
Normally on
X
X
X
Normally on
The whole network asynchronou s
Normally on
X
X
X
Normally off
The clock frame number abnormal.
Normally on
Normally on
X
X
X
HDLC link not established
Normally on
1 Hz flashing
X
X
X
The 8K clock abnormal
Normally on
X
X
X
1 Hz flashing
Note: X means “the indicator can be in any status ”. 6. EAM There are three indicators on the EAM board, i.e., power supply indicator, alarm indicator, and running indicator from top downwards. Meanings of combinations of the panel indicators are shown in Table 3-6. -105-
Maintenance Manual for ZXG10-BTS (V1A) Table 3-6 Names and meanings of the EAM indicators Indicated status
Power supply indicator
Alarm indicator (red)
(green)
Running indicator (green)
The board not powered on
Normally off
Normally off
Normally off
Initialization
Normally on
4Hz flashing
X
Working normally
Normally on
Normally off
1Hz flashing
HDLC link disconnected
Normally on
1 Hz flashing
1 Hz flashing
Normally on
Normally on
Normally on
The system clock severely abnormal
Note: X means “the indicator can be in any status”.
3.2OMU operation information 3.2.1OMU board not powered on 1. Meaning: The OMU board is not powered on 2. Relative information: None. 3. Cause: The OMU board is not powered on. 4. Handling method: Turn on the power switch. 5. Precautions: None.
3.2.2OMU board powered on 1. Meaning: The OMU board is powered on 2. Relative information: None. 3. Cause: The OMU board is powered on. 4. Handling method: No handling is required. 5. Precautions: None.
3.2.3OMU BOOT starting 1. Meaning: OMU BOOT starting
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Chapter 3 Running Information Processing
2. Relative information: None. 3. Cause: When the board is started, BOOT invokes the programs from the FLASH into the memory. 4. Handling method: No handling is required. 5. Precautions: None.
3.2.4OMU in active status 1. Meaning: OMU in active status 2. Relative information: None. 3. Cause: OMU is in the active status. 4. Handling method: No handling is required. 5. Precautions: None.
3.2.5OMU in standby status 1. Meaning: OMU in standby status 2. Relative information: None. 3. Cause: OMU is in the standby status. 4. Handling method: No handling is required. 5. Precautions: None.
3.2.6OMU procedure initially launched 1. Meaning: OMU process initially started. 2. Relative information: None. 3. Cause: The process is started and initializes the parameter variables. 4. Handling method: No handling is required. 5. Precautions: None.
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3.2.7OMU clock fault 1. Meaning: clock fault 2. Relative information: None. 3. Cause: clock fault 4. Handling method: 1) Reset the CKU board. 2) If resetting doesn’t work, replace the CKU board. 5. Precautions: None.
3.2.8OMU LAPD link disconnected. 1. Meaning: LAPD link is disconnected. 2. Relative information: None. 3. Cause: The LAPD link is disconnected. 4. Handling method: 1) Check whether the boards of BSC (such as the LAPD board, the SMB board) work normally, and whether there is any alarm present. If there are alarms, clear the alarms first. 2) Check whether the LAPD time slots of OMU are allocated correctly. 3) Check whether E1 line is connected through. 4) Check whether the BTS rack is powered on, and whether OMU is started normally. 5) Check whether BIE of BTS works normally. Clear the alarms first if there is any. 6) If none of the above measures works, please contact the regional office of ZTE Corporation. 5. Precautions: None.
3.2.9OMU system in the initialization status 1. Meaning: the OMU system is in the initialization status.
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Chapter 3 Running Information Processing
2. Relative information: None. 3. Cause: BSC downloads data to OMU, such as the cell attribute, the station configuration, etc. 4. Handling method: No handling is required. 5. Precautions: None.
3.2.10OMU file downloading 1. Meaning: OMU file downloading 2. Relative information: None. 3. Cause: Versions of BSC and OMU are inconsistent or OMCR forcefully downloads the software. 4. Handling method: No handling is required. 5. Precautions: Do not interrupt the download process manually.
3.3TRU operation information 3.3.1TRU board not powered on 1. Meaning: The TRU board is not powered on 2. Relative information: None. 3. Cause: The TRU board is not powered on. 4. Handling method: Turn on the power switch. 5. Precautions: None.
3.3.2TRU board powered on 1. Meaning: The OMU board is powered on 2. Relative information: None. 3. Cause: The TRU board is powered on. 4. Handling method: No handling is required.
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5. Precautions: None.
3.3.3BOOT starting 1. Meaning: OMU BOOT starting 2. Relative information: None. 3. Cause: When the board is started, BOOT invokes the programs from the FLASH into the memory. 4. Handling method: No handling is required. 5. Precautions: None.
3.3.4Process initially started 1. Meaning: OMU process is initially started. 2. Relative information: None. 3. Cause: The process is started and initializes the parameter variables. 4. Handling method: No handling is required. 5. Precautions: None.
3.3.5OMU clock fault 1. Meaning: clock fault 2. Relative information: None. 3. Cause: clock fault 4. Handling method: 1) Reset the CKU board. 2) If resetting doesn’t work, replace the CKU board. 5. Precautions: None.
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Chapter 3 Running Information Processing
3.3.6LAPD link disconnected 1. Meaning: the LAPD link is disconnected. 2. Relative information: None. 3. Cause: The LAPD link is disconnected. 4. Handling method: 1) Check whether there is any alarm at the base station BIE, whether E1 line is correctly connected, and whether there is any alarm on SMB board, LAPD board, DSN board of BSC; if yes, then locate the fault and eliminate it. 2) Check whether the BSC data are correct, especially the T network connection and SMB time slot connection data etc. 3) Check whether the backplane line is correctly connected. 4) Reset TRU. 5) If none of the above measures works, please contact the regional office of ZTE Corporation. 5. Precautions: None.
3.3.7TRU HDLC link disconnected 1. Meaning: The HDLC link between TRU and OMU is disconnected. 2. Relative information: None. 3. Cause: The HDLC link between TRU and OMU is disconnected. 4. Handling method: The system can keep on running, but no data configuration can be made. If TRU link is disconnected for a long time, the user may try the following methods for troubleshooting. 1) Check whether the TRU board is inserted properly. 2) Reset the TRU board to see whether the alarm is recovered. 3) Check whether the clock board works normally.
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4) Check whether the address switch on the backplane is set correctly. 5) Check whether the O&M line of the backplane is correctly connected. 6) If none of the above measures works, please contact the regional office of ZTE Corporation. 5. Precautions: None.
3.3.8TRU system in the initialization status 1. Meaning: TRU system is in the initialization status. 2. Relative information: None. 3. Cause: BSC downloads data to TRU, such as the cell attribute, the station configuration, etc. 4. Handling method: No handling is required. 5. Precautions: None.
3.3.9TRU file downloading 1. Meaning: TRU file downloading 2. Relative information: None. 3. Cause: Versions of BSC and TRU are inconsistent or OMCR forcefully downloads the software. 4. Handling method: No handling is required. 5. Precautions: Do not interrupt the downloading process manually.
3.3.10TRU BCCH carrier indication 1. Meaning: The TRU is the carrier shelf where BCCH channel is located. 2. Relative information: None. 3. Cause: The TRU is the frame where BCCH channel is located, and BSC has delivered the system message to this TRU. 4. Handling method: No handling is required. 5. Precautions: None.
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Chapter 3 Running Information Processing
3.4BIE running information 3.4.1BIE board not powered on 1. Meaning: The BIE board is not powered on 2. Relative information: None. 3. Cause: The BIE board is not powered on. 4. Handling method: Turn on the power switch. 5. Precautions: None.
3.4.2BIE program out of service 1. Meaning: BIE program runs out of service 2. Relative information: None. 3. Cause: Abnormal program and board fault. 4. Handling method: Reset manually or replace the BIE board. 5. Precautions: None.
3.4.3BIE HDLC link not established 1. Meaning: The HDLC link between BIE and OMU is disconnected. 2. Relative information: None. 3. Cause: The HDLC link between BIE and OMU is disconnected. 4. Handling method: The system can keep on running, but no data configuration can be made. If the TRU link is disconnected for a long time, the user may try the following methods for troubleshooting. 1) Check whether the BIE board is inserted properly. 2) Reset the BIE board to see whether the alarm is recovered. 3) Check whether the clock board works normally.
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4) If none of the above measures works, please contact the regional office of ZTE Corporation. 5. Precautions: None.
3.4.4BIE working normally 1. Meaning: BIE works normally 2. Relative information: None. 3. Cause: BIE works normally. 4. Handling method: No handling is required. 5. Precautions: None.
3.4.5BIE in the active status 1. Meaning: OMU in the active status 2. Relative information: None. 3. Cause: BIE is in the active status. 4. Handling method: No handling is required. 5. Precautions: None.
3.5EBIE running information 3.5.1EBIE board not powered on 1. Meaning: The EBIE board is not powered on 2. Relative information: None. 3. Cause: The EBIE board is not powered on. 4. Handling method: Turn on the power switch. 5. Precautions: None.
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3.5.2EBIE program out of service 1. Meaning: The EBIE program runs out of service 2. Relative information: None. 3. Cause: Abnormal program and board fault. 4. Handling method: Reset manually or replace BIE board. 5. Precautions: None.
3.5.3EBIE 8K and E1 alarm 1. Meaning: There is some problem with the E1 signal or the rack clock signal from BSC. 2. Relative information: None. 3. Cause: There is some problem with the E1 signal or the rack clock signal from BSC. 4. Handling method: 1) Check whether the EBIE board and the CKU board are inserted properly. 2) Check whether the E1 line is connected properly. 3) Power off the public shelf, then power on it again. 4) If the whole rack has clock alarms, then replace the CKU board. 5) Replace the EBIE board. 6) If none of the above measures works, please check whether the transmission is normal. 5. Precautions: None.
3.5.4EBIE HDLC link not established 1. Meaning: The HDLC link between EBIE and OMU is disconnected. 2. Relative information: None. 3. Cause: The HDLC link between EBIE and OMU is disconnected.
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4. Handling method: The system can keep on running, but no data configuration can be made. If EBIE link is disconnected for a long time, the user may try the following methods for troubleshooting. 1) Check whether the EBIE board is inserted properly. 2) Reset the EBIE board to see whether the alarm is recovered. 3) Check whether the clock board works normally. 4) If none of the above measures works, please contact the regional office of ZTE Corporation. 5. Precautions: None.
3.5.5EBIE working normally 1. Meaning: EBIE works normally 2. Relative information: None. 3. Cause: EBIE works normally. 4. Handling method: No handling is required. 5. Precautions: None.
3.5.6EBIE in active status 1. Meaning: EBIE is in the active status 2. Relative information: None. 3. Cause: EBIE is in the active status. 4. Handling method: No handling is required. 5. Precautions: None.
3.5.7EBIE parameter configuration 1. Meaning: EBIE parameter configuration 2. Relative information: None.
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3. Cause: OMU configures the connection of EBIE. 4. Handling method: No handling is required. 5. Precautions: None.
3.6CKU running information 3.6.1CKU board not powered on 1. Meaning: The CKU board is not powered on 2. Relative information: None. 3. Cause: The CKU board is not powered on. 4. Handling method: Turn on the power switch. 5. Precautions: None.
3.6.2CKU initialization 1. Meaning: CKU initialization. 2. Relative information: None. 3. Cause: The board hardware and software are initialized. 4. Handling method: No handling is required. 5. Precautions: None.
3.6.3CKU program out of service 1. Meaning: CKU program out of service 2. Relative information: None. 3. Cause: Abnormal program or board fault. 4. Handling method: Reset manually or replace the CKU board. 5. Precautions: None.
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3.6.4CKU working normally 1. Meaning: CKU works normally 2. Relative information: None. 3. Cause: CKU works normally. 4. Handling method: No handling is required. 5. Precautions: None.
3.6.5CKU in the active status 1. Meaning: CKU is in the active status 2. Relative information: None. 3. Cause: CKU is in the active status. 4. Handling method: No handling is required. 5. Precautions: None.
3.6.6CKU in the phase lock status 1. Meaning: CKU is in phase lock status 2. Relative information: None. 3. Cause: When the system configuration parameter is “external synchronization mode”, the clock signals of CKU and E1 are in the synchronization status. 4. Handling method: Reset manually or replace the CKU board. 5. Precautions: The procedure of power-on and phase lock may take about 10 minutes.
3.6.7CKU in the locked status 1. Meaning: CKU is in the locked status 2. Relative information: None. 3. Cause: When the system configuration parameter is “external synchronization mode”, the clock
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signals of CKU and E1 are in the synchronization status. 4. Handling method: No handling is required. 5. Precautions: None.
3.6.8Asynchronization of the whole CKU network 1. Meaning: The whole CKU network is asynchronous. 2. Relative information: None. 3. Cause: When the system configuration parameter is “internal synchronization mode”, CKU is in the free-run mode. 4. Handling method: Re-calibrate after a period of time. 5. Precautions: None.
3.6.9The CKU clock frame number abnormal 1. Meaning: There is some problem with the rack clock or the TDMA frame number. 2. Relative information: None. 3. Cause: There is some problem with the rack clock or the TDMA frame number. 4. Handling method: 1) Insert the CKU properly. 2) Replace the CKU 5. Precautions: None.
3.6.10CKU HDLC link not established 1. Meaning: The HDLC link to OMU is not established. 2. Relative information: None. 3. Cause: The HDLC link to OMU is not established. 4. Handling method:
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1) The disconnection of LAPD of OMU is a normal case. Handle the problem of the LAPD link of OMU first in this case. 2) If links are established for all other MOs inside the rack, then replace the CKU board. 5. Precautions: None.
3.6.11The CKU 8K clock abnormal 1. Meaning: There are no 8K signals. 2. Relative information: None. 3. Cause: There are no 8K signals. 4. Handling method: Check the E1 connection line, the EBIE board and the CKU board. 5. Precautions: None.
3.7EAM running information 3.7.1EAM board not powered on 1. Meaning: The EAM board is not powered on 2. Relative information: None. 3. Cause: The EAM board is not powered on. 4. Handling method: Turn on the power switch. 5. Precautions: None.
3.7.2EAM initialization 1. Meaning: EAM initialization. 2. Relative information: None. 3. Cause: The board hardware and software are initialized. 4. Handling method: No handling is required. 5. Precautions: None.
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3.7.3EAM working normally 1. Meaning: EAM works normally 2. Relative information: None. 3. Cause: EAM works normally. 4. Handling method: No handling is required. 5. Precautions: None.
3.7.4EAM HDLC link disconnected 1. Meaning: The HDLC link to OMU is not established. 2. Relative information: None. 3. Cause: The HDLC link to OMU is not established. 4. Handling method: 1) The disconnection of LAPD of OMU is a normal case. Handle the problem of the LAPD link of OMU first in this case. 2) If links are established for all other MOs inside the rack, then replace the EAM board. 5. Precautions: None.
3.7.5The EAM system clock severely abnormal 1. Meaning: There are no system clocks. 2. Relative information: None. 3. Cause: There are no system clocks. 4. Handling method: 1) Check the CKU board. 2) Check the EAM board (if other boards on the rack have no clock alarms, replace the EAM board).
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5. Precautions: None.
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Appendix A Replacement of Boards and Parts A.1 Overview In the course of daily maintenance, replacing the faulty board is a frequently used and critical maintenance method. It is suggested that, when replacing a board, the maintenance personnel of the equipment room must contact relative technical personnel or the personnel in the regional office of ZTE Corporation for technical support and instruction. In the course of replacing the board, attentions should be given to the following principles. 1. The spare parts should be kept in anti-static packing bags (in which small bags of moisture absorbents are recommended), which are stored in cartons properly according to different types. The anti-static bags or cartons should be labeled of the types for easy identification. 2. Before replacing, carefully check whether there is any damage to the spare parts or whether there is any component missing, and make sure the spare board type is completely identical with the type of the faulty board to be replaced 3. Put on anti-static wrist straps when plugging/unplugging boards. When holding a board with your hands, never touch the circuit, components and devices or wiring slots on the board. Never use excessive force in plugging/unplugging, for fear of damaging the pins or slots on the boards or the backplane. 4. The replaced faulty board should be put into anti-static bags, and stored properly according to different types. 5. After unplugging the faulty board, install a standard filler panel in the vacant slot to prevent dust and for decoration, if no spare parts are available then. 6. When replacing an active board, switch over the active/standby boards first to turn the standby board into the active status. 7. When replacing PA or HYCOM, please make sure to pull out the input cable of the module before pulling out its output cable. On the contrary, connect the output cable first before connecting the input cable, so as to avoid no output connection when there input into PA or HYCOM. -123-
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8. Make sure to insert the module in position, and tighten the panel screws of the module. 9. For replacing the power board and MP, plugging/unplugging with power-on is strictly prohibited.
A.2 Replacement of the public shelf board Replace the public shelf board in the following steps: 1. Preparations for the replacement 1) Determine that the board is faulty and needs a replacement through fault observation and analysis. 2) Make sure that the spare part functions perfectly and with the identical type of the faulty board. 3) Prepare some anti-static bags, small bags of moisture absorbents, cartons for different types as well as some labels for making marks. 2. Replacement steps: 1) Put on the anti-static wrist strap. 2) When replacing an active board, switch over the active/standby boards first to turn the standby board into the active status. 3) Loosen the retaining screws on the panel, then pull the spanner on the faulty board outwards and downwards with a proper force of one hand. When the board is separated from the slot and bounces out of it, pull the board out gently with the other hand holding the bottom of the board. In the course, try your best to avoid touching the components and circuits on the board with your hands. 4) Put the replaced faulty board into an anti-static bag containing small bags of moisture absorbents, paste on the bag the label of the board model, the program version and such word as “faulty”. Store the faulty boards properly in the cartons according to different types. The cartons should also be pasted with corresponding labels on the exterior for later identification and handling. 5) Insert the spare board into the specified slot of the plug-in frame in accordance with its name. Press the spanner on the board with the thumb and push in the board with proper force until the spanner is locked, indicating that the board is placed in position. Then tighten the
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Appendix A Replacement of Boards and Parts
screws on the panel. 6) If an active board is replaced, switch over the active/standby boards once again after the replacement so as to turn the new board into the active status. 3. Confirm after the replacement When the board is just plugged in, it will take some time for self-test. If the self-test is successful, the indicator will display normally and the service is resumed, indicating successful replacement. Refer to Chapter 3 in this manual for the judgement method of the indicator status display. If the self-test fails, i.e., the self-test is repeated endlessly or the final display is abnormal, and the service of the relative unit is not resumed, it indicates unsuccessful replacement. Then please check and determine once again whether the spare part is damaged, or the cause of the fault does not lie in this board, then locate the fault through observing the alarms in LMT.
A.3 Replacement of the carrier shelf board Replace the carrier shelf board in the following steps: 1. Preparations for the replacement 1) Make sure that the board is faulty and needs replacing through fault observation and analysis. 2) Make sure that the spare part functions perfectly with the identical type of the faulty board. 3) Prepare anti-static bags, small bags of moisture absorbents, cartons for different types as well as some labels for making marks. 2. Replacement steps: 1) Put on the anti-static wrist strap. 2) Switch off the PSB power supply of this layer. 3) Loosen the retaining screws on the panel, then pull the spanner on the faulty board outwards and downwards with a proper force of one hand. When the board is separated from the slot and bounces out of it, pull the board out gently with the other hand holding the bottom of the board. In the course, try your best to avoid touching the components and circuits on the board with your hands. 4) Put the replaced faulty board into an anti-static bag containing small bags of moisture absorbents, paste on it a label of the board model, the program version and such word as -125-
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“faulty”. Store the faulty boards properly in the cartons according to different types. The cartons should also be labeled on the exterior for later identification and handling. 5) Insert the spare board into the specified slot of the plug-in frame in accordance with its name. Press the spanner on the board with the thumb and push in the board with proper force until the spanner is locked, indicating that the board is placed in position. Then tighten the screws on the panel. 6) Switch on the PSB power supply of this layer. 3. Confirm after the replacement When the board is just plugged, it will take some for self-test. If the self-test is successful, the indicator will display normally and the service is resumed, indicating successful replacement. Refer to Chapter 3 in this manual for the judgment method of the indicator status display. If the self-test fails, i.e., the self-test is repeated endlessly or the final display is abnormal, and the service of the relative unit is not resumed, it indicates unsuccessful replacement. Then please check and determine once again whether the spare part is damaged, or the cause of the fault does not lie in this board, then locate the fault through observing the alarms in LMT.
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Appendix B Abbreviations
Abbr.
English name
Abis
Interface between BSC and BTS
ARFCN
Absolute Radio Frequency Channel No
BCCH
Broadcast Control Channel
BIE
Base Station Interface Equipment
BER
Bit Error Rate
BSC
Base Station Controller
BSIC
Base Station Identify Code
BTS
Base Transceiver Station
CCCH
Calling Control Channel
CELL
Cellular
CHP
Channel Processor
CKU
Clock Unit
CU
Carrier Unit
DAAU
Alarm adaptor unit
DTX
Discontinuous Transmission
E1
PCM 2M data link
EAM
External Alarm Module
EBIE
Enhanced Base station Interface Equipment
FU
Frame Unit
GPRS
General Packet Radio Service
HDLC
High Speed Data Link Control
HW
HighWay
HYM (HYCOM)
Hybrid Combiner
LAPD
Link Access Procedure D Channel
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(continued) Abbr.
English name
LAPDm
Link Access Procedure Dm (mobile D) Channel
LM
Local Manager
LMT
Local Manager Terminal
MMI
Man-Machine Interface
MO
Managed Object
MS
Mobile Station
MSC
Mobile services Switching Center
MUL
Multi Coupler
OMC
Operation and Maintenance Center
OMU
Operation & Maintenance Unit
PA
Power Amplifier
PEU
Power Extension unit
PSA
Power Supply A
PSB
Power Supply B
PUB
Public Unit Board
RACH
Random Access Channel
SDU
Signal Distribute Unit
SITE
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TCH/F
Traffic Channel (Full rate)
TCH/H
Traffic Channel (Half rate)
TEI
Terminal Equipment Identifier
TRU
Transceiver Unit
TRX
Transceivers
Um
Wireless Air Interface
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