Page 1: Maintenance Manual
ZXG10 BS21 Compact Outdoor BTS for GSM Maintenance Manual Version 2.2 ZTE CORPORATION ZTE Plaza, Keji Road South, Hi-Tech Industrial Park, Nanshan District, Shenzhen, P. R. China 518057 Tel: (86) 755 26771900 800-9830-9830 Fax: (86) 755 26772236 URL: http://support.zte.com.cn E-mail: doc@zte.com.cn...
Page 2: Revision History
The contents of this document are protected by copyright laws and international treaties. Any reproduction or distribution of this document or any portion of this document, in any form by any means, without the prior written consent of ZTE CORPORATION is prohibited. Additionally, the contents of this document are protected by contractual confidentiality obligations.
Page 3 Please fax to: (86) 755-26772236; or mail to Publications R&D Department, ZTE CORPORATION, ZTE Plaza, A Wing, Keji Road South, Hi-Tech Industrial Park, Shenzhen, P. R. China 518057. Thank you for your cooperation! Document ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Name Product Document V2.2 R1.1...
Page 4 This page is intentionally blank.
Page 5: Table Of Contents
Contents About this Maintenance Manual ...............xi Purpose of this Maintenance Manual................ xi Typographical Conventions..................xii Mouse Operation Conventions................xiii How to Get in Touch .....................xiii Customer Support.........................xiii Documentation Support......................xiii Chapter 1..................1 Maintenance Security.................1 Overview .......................2 Symbol Description....................2 Toxic Substances....................4 Beryllia ...........................4 Hydrochloride..........................4 Electrical Safety......................5 Tools ............................5...
Page 6 High Temperature ....................11 Board Plugging/Unplugging ................... 11 Do-Nots....................... 12 Chapter 2..................13 Maintenance Overview................13 Categories of Daily Maintenance................14 Common Maintenance Methods ................14 Precautions on Daily Maintenance ................16 Chapter 3..................19 Routine Maintenance ................19 Daily Routine Maintenance ..................20 Viewing Current Alarms ......................20 Viewing Alarms in Each Module ....................22 Viewing Current Notification Information ................25...
Page 7 Checking E1 Interfaces ......................75 Checking Antenna Feeder Interfaces ..................76 Checking Whether Lightning Protection Arrester is in Good Condition........76 Checking whether Grounding Cable is Reliable ................78 Grounding Resistance Test.....................78 Checking Running Status of Transmission Equipment..............79 Checking Running Status of UPS ....................79 Chapter 4..................
Page 8 TPU’s CHP DSP1~3 Initialization Failure................106 RFAD6620 Initialization Failure.....................107 RFAD6620 Resource Unavailable..................107 CIP Resource Unavailable ....................108 TPU’s FLASH MEMORY Error....................109 WATCHDOG Overflow in TPU’s CHP DSP0................109 WATCHDOG Overflow in TPU’s CHP DSP1~3 ................110 WATCHDOG Overflow in FUC....................111 Parameter Configuration Error in TPU’s Channel 0~7 ............111 Inconsistent Cell Parameter Configuration................112 Inconsistent FUC Software Versions ..................112 Inconsistent CHP Software Versions ..................113...
Page 9 Poor Conversation Quality at BS...................134 Troubleshooting in BS Maintenance Stage............. 137 Shrinkage of BS Coverage ....................137 Cell Carrier not Occupied .....................140 LAPD Broken-Link of BS Carrier....................142 BS in Normal Status but BS Handover Is Abnormal...............147 Handling Lightning-Stricken BS Faults ..................149 MS Signal is not Stable in Idle State ..................151 Unstable MS Signal in Conversation..................153 TCH Assigned with Low Success Ratio and Calls Are Difficult to Get through......154...
Page 10 Tower Amplifier Replacement ................191 Antenna Replacement..................192 Appendix B ................. 195 Common Maintenance Tables............... 195 Daily Maintenance Record Table................195 Weekly Maintenance Record Table ............... 196 Monthly Maintenance Record Table ..............197 Biannual Maintenance Record Table ..............198 Emergency Failure Record Table ................199 Appendix C .................
Page 11: About This Maintenance Manual
ZXG10 BS21 (V2.2). The manual serves as a reference manual in the maintenance and fault handling of the ZXG10 BS21 (V2.2) equipment.
Page 12: Typographical Conventions
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Chapter 4, Notification and Handling, provides notification messages related to the ZXG10 BS21 (V2.2) base station controller in the ZXG10- BSS base station subsystem so that the system maintenance personnel can have a clear understanding of notification messages in the system, including meanings causes and handling of notification messages.
Page 13: Mouse Operation Conventions
Customer Support If you have problems, questions, comments, or suggestions regarding your product, contact us by e-mail at support@zte.com.cn. You can also call our customer support center at (86) 755 26771900 and (86) 800- 9830-9830.
Page 14 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual suggestions on the documentation, you can contact us by e-mail at doc@zte.com.cn; or you can fax your comments and suggestions to (86) 26772236. also explore website http://support.zte.com.cn, which contains various interesting subjects like documentation, knowledge base, forum and service request.
Page 15: Chapter 1
C h a p t e r Maintenance Security In this chapter, you will learn about: Safety regulations to be observed Instructions on the safety symbols Confidential and Proprietary Information of ZTE CORPORATION...
Page 16: Overview
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Overview To avoid any accident, please carefully read safety instructions in this chapter before conducting any maintenance operation on the ZXG10 BS21 (V2.2) device. If there are local safety specifications to be followed, the safety instructions here shall only serve as a supplement to the local safety specifications.
Page 17 This sign means that an injury, equipment damage or interruption of local services may occur if you ignore this safety warning. To the right of a safety sign is a text indicating its safety level. Under the sign is the detailed safety description. Confidential and Proprietary Information of ZTE CORPORATION...
Page 18: Toxic Substances
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Toxic Substances Beryllia Warning: Beryllia is a type of toxic chemical existing in the transistor and other components. The power amplifier circuit and AEM circuit in the base station contain Beryllia, so it is advised not to touch these components directly under any circumstances.
Page 19: Electrical Safety
Additionally, metal pieces inside the cabinet created by the drilling could result in a shorted circuit board. When it is necessary to drill holes in the cabinet in some special cases, please wear insulated protective gloves and move away the cables in the Confidential and Proprietary Information of ZTE CORPORATION...
Page 20: Thunder
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual cabinet before drilling. Take care to protect your eyes during drilling. Flying metal scraps may harm your eyes. In addition, please promptly clean and clear metal scraps after drilling. Thunder...
Page 21: Storage Battery
To ensure safety, please pay attentions to the following points before battery installation and maintenance: Confidential and Proprietary Information of ZTE CORPORATION...
Page 22: Short Circuit
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 1. Handle the battery with care. Do not vibrate it violently. 2. Do not wear any object that contains metal, such as watch, chain, bangle or ring. 3. Use special-purpose insulation tools.
Page 23: Storage Battery Replacement
Warning: When conducting installation and servicing operations around the operating antenna, keep adequate distance from the antenna. Confidential and Proprietary Information of ZTE CORPORATION...
Page 24: Working At Heights
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Do not unplug the connector of the transmitter output feeder or of the antenna feeder cable when the transmitter is operating. Power off the corresponding transmitter when you need to unplug the connector of the feeder cable or to work beside the transmitter antenna.
Page 25: Fans
Never plug a board too hard, so as not to deform the pins on the backplane. Plug a board along the slot to avoid short circuit due to touch with the circuit of the adjacent board. Confidential and Proprietary Information of ZTE CORPORATION...
Page 26: Do-Nots
Replacing any parts or altering the equipment might result in unexpected danger. Therefore, be sure not to replace any parts or alter the equipment unless otherwise authorized. To ensure your safety, if you have any question, please contact ZTE Corporation. Confidential and Proprietary Information of ZTE CORPORATION...
Page 27: Chapter 2
C h a p t e r Maintenance Overview In this chapter, you will learn about: Categories of daily maintenance Common maintenance methods Precautions on daily maintenance Confidential and Proprietary Information of ZTE CORPORATION...
Page 28: Categories Of Daily Maintenance
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Categories of Daily Maintenance Daily maintenance of the BS21 (V2.2) device can be divided into routine maintenance, handling of notification information and alarm information as well as troubleshooting. 1. Routine maintenance...
Page 29 We can judge whether the board actually fails according to whether the fault disappears after board replacement. It should be noted that no matter the comparison or replacement method is adopted, the board Confidential and Proprietary Information of ZTE CORPORATION...
Page 30: Precautions On Daily Maintenance
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual unplugging/plugging operation should be performed in accordance with the relevant description in Appendix of this manual. 7. Isolating When a part of the system fails, it can be isolated from other relevant boards or racks to judge whether the fault is caused by mutual influence.
Page 31 12. Handle any detected fault as soon as possible. In case of a fault that cannot be handled, please contact the local ZTE office in time. The contact means of the local ZTE office should be placed in a striking place and be notified to all maintenance personnel for the convenience of timely contact in need of support.
Page 32 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual This page is intentionally blank. Confidential and Proprietary Information of ZTE CORPORATION...
Page 33: Chapter 3
C h a p t e r Routine Maintenance In this chapter, you will learn about: Daily routine maintenance Weekly routine maintenance Monthly routine maintenance Biannual routine maintenance Confidential and Proprietary Information of ZTE CORPORATION...
Page 34: Daily Routine Maintenance
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Daily Routine Maintenance Table 4 is a checklist for daily routine maintenance of the BTS (V2.2). A B L E A I L Y O U T I N E...
Page 35 A list of alarms not recovered yet is on the upper right of the interface, and a notification list on the lower right part. Confidential and Proprietary Information of ZTE CORPORATION...
Page 36: Viewing Alarms In Each Module
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 4. In the logic view interface of alarm management, click a site, a cell, a carrier or a channel to be viewed in the left navigation tree, and then the current alarms for the selected object will be shown in the list on the right.
Page 37 I G U R E L A R M A N A G E M E N T H Y S I C A L I E W N T E R F A C E Confidential and Proprietary Information of ZTE CORPORATION...
Page 38 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 6. Click a BTS rack to be viewed in the left navigation tree to enter the interface displaying the physical rack, as shown in Figure 7. I G U R E...
Page 39: Viewing Current Notification Information
L A R M A N A G E M E N T L A R M I S T O R Y U E R Y N T E R F A C E Confidential and Proprietary Information of ZTE CORPORATION...
Page 40 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 5. Click [Alarm History Query] to enter the alarm query wizard as shown in Figure 10. 1 0 A I G U R E L A R M U E R Y...
Page 41 [Select information source], as shown in Figure 13. 1 3 A I G U R E L A R M U E R Y I Z A R D Confidential and Proprietary Information of ZTE CORPORATION...
Page 42 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 9. Click <Next> to enter the Alarm Query Wizard dialog box 3, as shown in Figure 14. 1 4 A I G U R E L A R M U E R Y I Z A R D 10.
Page 43: Viewing Real-Time Attributes Of A Carrier
I G U R E Y N A M I C A T A A N A G E M E N T A I N N T E R F A C E Confidential and Proprietary Information of ZTE CORPORATION...
Page 44: Creating Daily Performance Report
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 4. Click a site, a cell, a carrier or a channel to be shown in the left navigation tree, and the current status of the selected object will be shown on the right list. See Figure 17.
Page 45 Figure 19. 1 9 P I G U R E E R F O R M A N C E E P O R T I Z A R D Confidential and Proprietary Information of ZTE CORPORATION...
Page 46 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 5. First, select a NM domain in the pull-down menu and then in [Please select domain and type of report], specify “System performance report” in [Selected Type] field. Click “>” to add the selected type to [All Types], as shown in Figure 20.
Page 47 8. Click <Next> to enter the Performance Report Wizard 2, as shown in Figure 23. 2 3 P I G U R E E R F O R M A N C E E P O R T I Z A R D Confidential and Proprietary Information of ZTE CORPORATION...
Page 48 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 9. Click <Daily Report> in [Please select type and time of report], and click <Select Day> to enter the “Please select the time” dialog box, as shown in Figure 24.
Page 49: Creating A Daily Traffic Report
Figure 26. 2 6 P I G U R E E R F O R M A N C E E P O R T I Z A R D Confidential and Proprietary Information of ZTE CORPORATION...
Page 50 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 5. First, select a domain in the pull-down menu of [Please select domain and type of report]. Then specify “Daily traffic report” in the [Selected Type] field. Click “>” to add the selected type to [All Types], as shown in Figure 27.
Page 51 8. Click <Next> to enter the Performance Report Wizard 2, as shown in Figure 30. 3 0 P I G U R E E R F O R M A N C E E P O R T I Z A R D Confidential and Proprietary Information of ZTE CORPORATION...
Page 52 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 9. Click <Finish> to generate a daily traffic report, as shown in Figure 31. 3 1 D I G U R E A I L Y R A F F I C...
Page 53: Weekly Routine Maintenance
3. Select [Fault Manage --> Alarm Management] in the OMCR main interface and enter the main interface of alarm management. 4. Select the menu [File --> Alarm History Query] in the alarm management interface, as shown in Figure 32. Confidential and Proprietary Information of ZTE CORPORATION...
Page 54 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 3 2 A – S I G U R E L A R M A N A G E M E N T E L E C T I N G...
Page 55 I G U R E L A R M U E R Y I Z A R D 8. Click <Next> and you will enter Alarm Query Wizard 3, as shown in Figure 36. Confidential and Proprietary Information of ZTE CORPORATION...
Page 56 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 3 6 A I G U R E L A R M U E R Y I Z A R D 9. Two query modes can be set in this interface: query by alarm code or by alarm class.
Page 57 O N F I R M E D I S T O R Y L A R M I S P L A Y [Handling] Observe the alarms that occur repeatedly. Make analysis of these alarms specifically and perform troubleshooting. Confidential and Proprietary Information of ZTE CORPORATION...
Page 58: Collecting Alarm Frequency Statistics
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Collecting Alarm Frequency Statistics [Instruments and meters] Collect alarm frequency statistics in the alarm management interface at the OMCR client end. [Test procedure] 1. Double click to start the OMCR client-end application program.
Page 59 Alarm sources highlighted in dark color are the selected alarm sources; those highlighted in light color are alarm sources whose subtrees are not completely selected, and those not highlighted are not selected at all. The already selected objects are displayed on the right. Confidential and Proprietary Information of ZTE CORPORATION...
Page 60 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 7. Click <Time>, and select <Start Time> and <Stop Time> in [Interval]. Click [All Alarms in Database] and [Custom] to select statistics of all alarms or certain alarms with highest frequencies. See Figure 43.
Page 61 To view statistics in a list, click “List”. Alternatively, click “Report” to start report wizard. [Handling] The statistics are based on the alarm frequencies. Make analysis of the alarms with higher frequencies specifically, and perform troubleshooting. Confidential and Proprietary Information of ZTE CORPORATION...
Page 62: Analyzing Performance Report
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Analyzing Performance Report Analyze the performance reports and daily traffic reports over the past week, to see whether a fault exists. If so, remove it. Monthly Routine Maintenance Table 6 contains a checklist for monthly routine maintenance items of the BS21 (V2.2).
Page 63 E L E C T O M A I N A N D E P O R T Y P E 6. Click <Next> to enter the Performance Report Wizard 1, as shown in Figure 49. Confidential and Proprietary Information of ZTE CORPORATION...
Page 64 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 4 9 P I G U R E E R F O R M A N C E E P O R T I Z A R D 7. Select the object level in the pull-down menu of [Please select the level of analyzed objects].
Page 65: Figure 51 Performance Report Wizard 2
10. Select the required month and click <OK>; then in [Select the busy time], select the start time and stop time. The busy hour time interval can only be set as one hour. Then click <Next> to enter the interface as shown in Figure 53. Confidential and Proprietary Information of ZTE CORPORATION...
Page 66: Figure 53 Select Start And Stop Date
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 5 3 S I G U R E E L E C T T A R T A N D T O P A T E 11. When the start and stop date have been specified, click <Finish> to display the content of the monthly report, as shown in Figure 54.
Page 67: Collecting Statistics Of Bad Cells
I Z A R D 5. Select the domain in the drop box and then select "bad cell report" in "All Types", and then click ">". The interface is as shown in Figure 56. Confidential and Proprietary Information of ZTE CORPORATION...
Page 68: Figure 56 Bad Cell Report
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 5 6 B I G U R E E L L E P O R T 6. Click <Next> and enter bad cell performance report wizard 1, as shown below.
Page 69: Figure 58 Select Analyzed Objects
I Z A R D 9. Click <Monthly Report> in [Please select type and time of report], and click <Select Month> to enter the “Please select the time” dialog box, as shown in Figure 60. Confidential and Proprietary Information of ZTE CORPORATION...
Page 70: Figure 60 Please Select Time (Month)
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 6 0 P I G U R E L E A S E E L E C T I M E O N T H 10. Select the required month and click <OK>, then in [Select the busy time], select the start date and stop date.
Page 71: Analyzing And Processing Reports
Create various types of reports in the performance management interface at the OMCR client end. [Test procedure] Analyze the monthly reports. [Normal result] Refer to Appendix D for telecom network operation maintenance quality indexes made by individual carriers (wireless part). Confidential and Proprietary Information of ZTE CORPORATION...
Page 72: Generating Monthly Operation Report
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual [Troubleshooting] Perform troubleshooting with reference to relevant information about traffic, call drop rate and handover success rate in Chapter 7. [Precautions] For more information about report analyzing and processing, refer to ZXG10-BSS (V2.0) BS Subsystem Operation Manual.
Page 73: Checking Bs21 Ac Power
2. The power cable is not aging. [Troubleshooting] If the power voltage is abnormal, check the AC power supply equipment and conduct relevant troubleshooting. If the power cable is aging, please replace it in time. [Recovery after test] None. Confidential and Proprietary Information of ZTE CORPORATION...
Page 74: Checking Running Status Of Heat Exchanger
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Checking Running Status of Heat Exchanger [Instruments and meters] None. [Test procedure] Eyeballing method. [Normal result] 1. The fan works normally. 2. There is no leakage water or rust inside the heat exchanger.
Page 75: Checking Running Status Of Cmm Module
The green indicator flashes (1 Hz) / system Green / Status indicator initialization The green indicator flashes (4 Hz) / software loading under way [Troubleshooting] Table 9 lists the abnormal status of the indicators on the CMM module panel. Confidential and Proprietary Information of ZTE CORPORATION...
Page 76: Table 9 Abnormal Status Of Indicators On Cmm Module Panel
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual C M M M A B L E B N O R M A L T A T U S O F N D I C A T O R S O N...
Page 77 E1 Interfaces (A, D and E Interfaces)”. For troubleshooting of E1 interface receiving backward slip code alarms, refer to “Backward Slip Code Indication at Receiving End of E1 Interfaces (A, D and E Interfaces)”. [Recovery after test] None. Confidential and Proprietary Information of ZTE CORPORATION...
Page 78: Checking Running Status Of Etrm Module
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Checking Running Status of ETRM Module [Instruments and meters] None. [Test procedure] Check the status of the indicators on the ETRM module panel. [Normal result] Table 10 shows the normal status of the indicators on the ETRM module panel.
Page 79: Table 11 Relationship Between Indicator Bit Display And Number Of Activated Ts
“1”. If all extBCCH channels are blocked or faulty, the red indicator is on constantly. [Troubleshooting] Table 12 lists abnormal status of indicators on ETRM module panel. Confidential and Proprietary Information of ZTE CORPORATION...
Page 80: Table 12 Abnormal Status Of Indicators On Etrm Module Panel
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 1 2 A E T R M M A B L E B N O R M A L T A T U S O F N D I C A T O R S O N...
Page 81: Checking Running Status Of Ecdu Module
Checking Running Status of ECDU Module [Instruments and meters] None. [Test procedure] Check status of indicators on CDU module panel. [Normal result] Table 13 lists normal status of indicators on CDU module panel. Confidential and Proprietary Information of ZTE CORPORATION...
Page 82: Table 13 Normal Status Of Indicators On Cdu Module Panel
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 1 3 N C D U M A B L E O R M A L T A T U S O F N D I C A T O R S O N...
Page 83: Measuring Amplifier Output Power
Re-establish the connection between the amplifier output terminal and the AEM module. Measuring SWR of Antenna Feeder [Instruments and meters] A SiteMaster tester and a testing cable. Confidential and Proprietary Information of ZTE CORPORATION...
Page 84 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual [Test procedure] 1. Turn on the SiteMaster power switch. 2. Select OPT in the main menu. 3. Select the items whose SWR need be measured. 4. Select key FREQ in the main menu and input the start and stop scanning frequencies 5.
Page 85: Calibrating Clock
DAC value box to adjust the value. The step length of each increase or decrease in the DAC value is determined by the step value. Three options are available: 1, 3 and 10. Confidential and Proprietary Information of ZTE CORPORATION...
Page 86: Checking Fastness Of Antennae And Towers
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual After the DAC value has been specified, the system calculates the corresponding voltage automatically. Press the “Calibrate” button to inform the foreground to start calibration. Observe the cymometer to see whether the clock is adjusted to 13 M.
Page 87: Figure 64 Rotary Goniometer With Air Bleeder
B L I Q U I T Y 2. Rotate the dial until the bubble in the air bleeder is located in the middle of two indication rings. 3. Read the scale on the dial. [Normal result] Confidential and Proprietary Information of ZTE CORPORATION...
Page 88: Checking Whether Antenna Feeder Connectors And Lightning Protection Grounding Kit Are Waterproof
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual The obliquity is consistent with what is required in network planning. [Troubleshooting] 1. Rotate the dial to the set angle. 2. Press the object to be measured against the dial chassis firmly, and move them together until the bubble in the air bleeder in the middle of two indication rings.
Page 89: Checking E1 Interfaces
[Normal result] 1. The E1 cable is not aging, distorted, extruded, transformed or too tight. 2. The E1 terminal is fixed. 3. The red SYN indicator on the CMM panel is off. [Troubleshooting] Confidential and Proprietary Information of ZTE CORPORATION...
Page 90: Checking Antenna Feeder Interfaces
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 1. If the red SYN indicator on the CMM panel is on, it shows that the E1 line is broken or disconnected. To solve this problem, check the trunk cable in the E1 interface at the bottom of the BS21 to see whether the trunk cable is tightly connected and whether the contact is good.
Page 91 The resistance between the conductor in the antenna and the ground is approximately 0 Ω. [Troubleshooting] Replace the lightning protection arrester if the result is beyond the valid range. For more details, refer to “Antenna Feeder Lightning Arrester”. [Recovery after test] Confidential and Proprietary Information of ZTE CORPORATION...
Page 92: Checking Whether Grounding Cable Is Reliable
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Reconnect the jumper connector with the two ports of the lightning protection arrester; then re-power on the ETRM modules and recover the system. [Precautions] Avoid damaging the grounding connection of the lightning protection arrester.
Page 93: Checking Running Status Of Transmission Equipment
Refer to User Manual for the transmission equipment. [Recovery after test] None. Checking Running Status of UPS [Instruments and meters] None. [Test procedure] Check whether there is battery leakage, and whether contact of the connected lines is reliable. Confidential and Proprietary Information of ZTE CORPORATION...
Page 94 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual [Normal result] There is no battery leakage and the connection is normal. [Troubleshooting] Refer to the UPS Instructions. [Recovery after test] None. Confidential and Proprietary Information of ZTE CORPORATION...
Page 95: Chapter 4
C h a p t e r Notification and Handling In this chapter, you will learn about: Summary of notification information No traffic notification in the BS cell Confidential and Proprietary Information of ZTE CORPORATION...
Page 96: Summary Of Notification Information
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Summary of Notification Information BTS notification information indicates the non-repeatable or instant abnormal event that happens during BTS’s running, informing the maintenance personnel of the running statuses of BTS's every part.
Page 97 “Calibrating Clock”. Power off ETRM modules and restart them to observe whether there is any traffic. Power off CMM modules and restart them to observe whether there is any traffic. Changeover ETRM modules. Confidential and Proprietary Information of ZTE CORPORATION...
Page 98 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual This page is intentionally blank. Confidential and Proprietary Information of ZTE CORPORATION...
Page 99: Chapter 5
C h a p t e r Alarms and Handling In this chapter, you will learn about: Summary of the alarms CMM alarms ETRM alarm Confidential and Proprietary Information of ZTE CORPORATION...
Page 100: Summary Of Alarms
If an alarm affects several indexes, it should consider upgrading the alarm level. Alarm handling varies with the alarm levels. 1. When level-1 or level-2 alarms appear, contact the local ZTE office immediately and handle the problems under the guide of the ZTE engineers.
Page 101: Table 16 Summary Table Of Alarms
Refer to “Backward Slip Backward slip code 0X1A35, Code Indication indication at the transmit 0X1A4D, Transmitting End of E1 end of E1 interfaces (A, D 0X1A55 Interfaces (A, D and E and E interfaces) Interfaces)” Confidential and Proprietary Information of ZTE CORPORATION...
Page 102 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Code Alarm Default Alarm Name Remarks Type Level (ID) Refer to “Forward Slip Forward slip code 0X1A36, Code Indication indication at the receive 0X1A4E, Receiving End of E1 end of E1 interfaces (A, D...
Page 103 Refer to “WATCHDOG WATCHDOG overflow in 0X1B10 Overflow in TPU’s CHP TPU’s CHP DSP0 DSP0” 0X1B11, Refer to “WATCHDOG WATCHDOG overflow in Overflow in TPU’s CHP 0X1B12, TPU’s CHP DSP1 ~ 3 DSP1~3” 0X1B13 Confidential and Proprietary Information of ZTE CORPORATION...
Page 104: Cmm Alarms
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Code Alarm Default Alarm Name Remarks Type Level (ID) WATCHDOG overflow in Refer to “WATCHDOG 0X1B18 Overflow in FUC” Parameter configuration 0X1B1A Refer “Parameter error in TPU’s Channel 0 ~0X1B2 Configuration Error in TPU’s Channel 0~7”...
Page 105: Lapd Long-Time Link Disconnection
If all devices are normal, check whether the software flow has any problem with a signaling analyzer, and determine whether the problem is at the BTS side or BSC side. Then, take further measures as required. 5. Verification Confidential and Proprietary Information of ZTE CORPORATION...
Page 106: Cmm's Flash Programming Failure
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual The red STA indicator of the CMM board does not flash at 1 Hz frequency. 6. Precautions This alarm is not reported to BSC and can be viewed through the LMT.
Page 107: Power Over/Under-Voltage Alarms
Alarm code: 0X1A04, 0X1A09, 0X1A0A. Alarm level: 3. Alarm influence: the inner transmission link of the BTS is disconnected; the frame numbers are confusing and the frequency combiner is abnormal. Alarm unit location type: SITE. Confidential and Proprietary Information of ZTE CORPORATION...
Page 108: Software Accumulative Frame Number Inconsistent With Hardware Accumulative Frame Number
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Clock alarm is displayed on the front panel. Internal handling: none. 3. Cause The CMM clock unit works abnormally. 4. Handling method Replace the CMM. 5. Verification This alarm does not appear in the OMCR alarm interface.
Page 109: Alarms Of Communication Link To Main Rack
Master Rack and Left/Right Slave Rack 1. Description Alarm happens with the communication link between the master rack and left/right slave racks. 2. Related information Alarm code: 0X1A16, 0X1A17. Alarm Level. Alarm influence: SITE. Confidential and Proprietary Information of ZTE CORPORATION...
Page 110: E1 Carrier Wave Receiving Alarm (A, D And E Interfaces)
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Alarm unit location type: SITE. 3. Cause The communication link from the master rack to the slave rack is faulty. 4. Handling method Check whether the cables between the racks are connected securely and whether the cables have been damaged.
Page 111: Out-Of-Frame Alarm At Receiving End Of E1 Interfaces (A, D And E Interfaces)
This alarm does not appear in the OMCR alarm interface. 6. Precautions If the alarm does not appear frequently, it can be ignored. Forward Slip Code Indication at Transmitting End of E1 Interfaces (A, D and E interfaces) 1. Description Confidential and Proprietary Information of ZTE CORPORATION...
Page 112: Backward Slip Code Indication At Transmitting End Of E1 Interfaces (A, D And E Interfaces)
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Positive slip code indication appears at the E1 interface transmitting end (in the A, D and E interfaces). 2. Related information Alarm code: 0X1A34, 0X1A4C, 0X1A54. Alarm level: 3. Alarm influence: If it does not occur frequently, there is little influence on the call.
Page 113: Forward Slip Code Indication At Receiving End Of E1 Interfaces (A, D And E Interfaces)
Alarm influence: If it does not occur frequently, there is little influence on the call. If it occurs frequently (once every few minutes), it can cause abnormal conversation, or abnormal link establishment between ETRM and BSC. Alarm unit location type: SITE. Confidential and Proprietary Information of ZTE CORPORATION...
Page 114: Backward Slip Code Indication At Receiving End Of E1 Interfaces (A, D And E Interfaces)
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 3. Cause The chip is faulty; the clock is abnormal; there is phase difference from that of the BSC clock, or the E1 line is not connected securely. 4. Handling method Check the electrical connection performance of the E1 cable.
Page 115: Etrm Alarm
BS Subsystem Operation Manual. Alarm influence: customized; for details, please refer to ZXG10-BSS (V2) BS Subsystem Operation Manual. Alarm unit location type: SITE. 3. Cause For details, please refer to ZXG10-BSS (V2) BS Subsystem Operation Manual. Confidential and Proprietary Information of ZTE CORPORATION...
Page 116: Lna (Low Noise Amplifier) Alarm
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 4. Handling method No handling is required. 5. Verification None. 6. Precautions None. LNA (Low Noise Amplifier) Alarm 1. Description Overcurrent alarm happens with the LNA (low noise amplifier). 2. Related information Alarm code: 0X1AC8.
Page 117: Aem Swr Minor Alarm
Internal handling flow: Switch off the power amplifier, and then the ETRM will be disabled and the standing wave ratio alarm cannot be recovered automatically. It has to be recovered manually (reset the CMM). 3. Cause Confidential and Proprietary Information of ZTE CORPORATION...
Page 118: Aem Power Alarm
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Alarm happens when the AEM SWR is 3.0. 4. Handling method Refer to “Handling of SWR Major Alarms”. 5. Verification This alarm does not appear in the OMCR alarm interface.
Page 119: Aem Not-In-Position Alarm
This alarm does not appear in the OMCR alarm interface. 6. Precautions None. TPU’s CHP DSP0 Initialization Failure 1. Description TPU’s CHP DSP0 initialization fails. 2. Related information Alarm code: 0X1B04. Alarm level: 3. Confidential and Proprietary Information of ZTE CORPORATION...
Page 120: Tpu's Chp Dsp1~3 Initialization Failure
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Alarm influence: If the ETRM with the DSP0 is the BCCH carrier, the cell will not work normally. If not, the affected two physical channels of the ETRM cannot work normally, but the other channels can.
Page 121: Rfad6620 Initialization Failure
5. Verification This alarm does not appear in the OMCR alarm interface. 6. Precautions This alarm should be handled immediately. RFAD6620 Resource Unavailable 1. Description RFAD6620 resource is unavailable. 2. Related information Confidential and Proprietary Information of ZTE CORPORATION...
Page 122: Cip Resource Unavailable
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Alarm code: 0X1B09. Alarm level: 3. Alarm influence: The ETRM is unavailable. If it is a BCCH carrier, the operation of the whole cell will be affected. Alarm unit location type: FU.
Page 123: Tpu's Flash Memory Error
This fault may cause two channel of a carrier unit cannot work normally. If the carrier is a BCCH carrier, the whole cell will be unable to work normally. Alarm unit location type: FU Confidential and Proprietary Information of ZTE CORPORATION...
Page 124: Watchdog Overflow In Tpu's Chp Dsp1~3
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Internal handling flow: If the BTS has other TRXs, configure the BCCH into another TRX. 3. Cause The DSP0 of the channel processing unit does not respond temporarily. 4. Handling method First reset the TRX unit to see if the alarm can be recovered.
Page 125: Watchdog Overflow In Fuc
It affects the channel assignment and normal work. Alarm unit location type: FU. Internal handling flow: Relevant channels will be disabled; CMM tries to re-configure parameters. 3. Cause Confidential and Proprietary Information of ZTE CORPORATION...
Page 126: Inconsistent Cell Parameter Configuration
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual The parameter configuration is wrong. 4. Handling method Wait for 10 minutes. If the alarm is not recovered, reconfigure the parameters at the background and synchronize them to the BTS. If the fault persists, replace the ETRM module.
Page 127: Inconsistent Chp Software Versions
This alarm does not appear in the OMCR alarm interface. 6. Precautions This alarm should be handled immediately. Temporary No Response from FUC’s L3 Software 1. Description FUC’s L3 software does not respond temporarily. Confidential and Proprietary Information of ZTE CORPORATION...
Page 128: Disconnected Lapd Link Between Fuc And Bsc
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 2. Related information Alarm code: 0X1B25. Alarm level: 4. Alarm influence: The background cannot detect the FUC running conditions, but it does not affect the phone calls. Alarm unit location type: FU.
Page 129: Interrupted Communication Between Cmm And Fuc
Use the HW self-loop test to judge whether it is fault with hardware or software. If it the fault with hardware, replace the related module. If it is the fault with software, contact the local ZTE for handling. 5. Verification This alarm does not appear in the OMCR alarm interface.
Page 130: Tpu's Cip Initialization Failure
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual TPU’s CIP Initialization Failure 1. Description TPU’s CIP initialization fails. 2. Related information Alarm code: 0X1B28. Alarm level: 3. Alarm influence: The modulation module cannot work, and the carrier or cell (if the carrier is configured with BCCH) cannot work normally.
Page 131: Watchdog Overflow In Tpu's Cip
If the resetting cannot recover the alarm, replace the ETRM module. 5. Verification This alarm does not appear in the OMCR alarm interface. 6. Precautions This alarm should be handled immediately. Inconsistent CIP Software Versions 1. Description The CIP software version is inconsistent. Confidential and Proprietary Information of ZTE CORPORATION...
Page 132: Alarm With Clock Between Tpu And Cmm
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 2. Related information Alarm code: 0X1B2B. Alarm level: 3. Alarm influence: This ETRM cannot work normally. Alarm unit location type: FU. Internal handling flow: Re-download the latest CIP software version.
Page 133: Tpu Power Alarm
4. Handling method Measure whether the frame clock FCLK is normal at the frame number generation points. (If it is direct transmission, check whether the clock frequency or wave shape is distorted. If this is Confidential and Proprietary Information of ZTE CORPORATION...
Page 134: Receiving Rf Local Oscillator Pll1~2 Out Of Lock
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual phase-lock generation, check whether there is any out-of-lock alarm.) If there is any fault, replace the ETRM module. ii. Observe whether the transmission link is normal, including whether the transmitted clock is normal, whether the interface chip has any alarm, and whether the error rate is too big.
Page 135: Transmitting Rf Local Oscillator Pll1~2 Out Of Lock
Alarm influence: This ETRM cannot serve calls. Alarm unit location type: CU. Internal handling flow: This ETRM is disabled. 3. Cause The clock signal is unstable, or the ETRM phase-locked loop is faulty. Confidential and Proprietary Information of ZTE CORPORATION...
Page 136: Transmitting If Local Oscillator Pll Out Of Lock
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 4. Handling method Check whether there is any clock alarm through LMT. If yes, replace the module concerned; if not, check the front panel TP interface 13 M clock to see if there is any output. If there is no output, the clock from TPU to RCU is faulty.
Page 137: Pa Voltage Swr Alarm
If the fan works normally and the ambient temperature is normal, but the PA temperature alarm persists, the detection circuit may be faulty. Continue the observation. 5. Verification Confidential and Proprietary Information of ZTE CORPORATION...
Page 138: Pa Overheat Major Alarm
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual This alarm does not appear in the OMCR alarm interface. 6. Precautions None. PA Overheat Major Alarm 1. Description PA overheat major alarm happens. 2. Related information Alarm code: 0X1C0A.
Page 139: Pas Power Amplifier Power Supply Over-Voltage Alarm
This alarm does not appear in the OMCR alarm interface. 6. Precautions None. PAS Power Amplifier Power Supply Under-voltage Alarm 1. Description The PAS power amplifier power supply is under-voltage. 2. Related information Alarm code: 0X1C0D. Alarm level: 3. Confidential and Proprietary Information of ZTE CORPORATION...
Page 140: Dlrc_Al Downward Link Check Error
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Alarm influence: The output power is abnormal. Alarm unit location type: CU. 3. Cause The PA power amplifier power supply is under-voltage. 4. Handling method Check whether the PAS detection circuit is faulty. If so, replace the ETRM module in time.
Page 141: Chapter 6
Summary of common problems List of major faults Troubleshooting procedure of components failures Troubleshooting at the BS commissioning stage Troubleshooting in the BS maintenance stage Troubleshooting in the BS cutover and expansion stages Confidential and Proprietary Information of ZTE CORPORATION...
Page 142: Summary Of Common Problems
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Summary of Common Problems The common problems of BS21 (V2.2) device are shown in Table 17: 1 7 C B S 2 1 ( V 2 . 2 ) D...
Page 143: List Of Major Faults
1. Record the panel indicator states of the faulty components. 2. View alarms through OCMR or LMT. If LMT is normal but OMCR not, report the problem to ZTE. If conditions permitting, trace the signaling and attach the trace file.
Page 144: Troubleshooting At Bs Commissioning Stage
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Troubleshooting at BS Commissioning Stage BS Works Normally but Mobile Phone Has no Signals or Cannot Access Network 1. Symptom The mobile station has no signals, displaying “No network” or nothing, but BS is in good conditions (no alarms).
Page 145: Figure 67 Bs Fault Locating Flow Chart
MS Troubleshooting: Test whether the battery supply is deficient. If yes, please charge it. If not, move the MS to the open land or the place near to the BS to test again. Confidential and Proprietary Information of ZTE CORPORATION...
Page 146: Handling Of Swr Major Alarms
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual iii. Network side troubleshooting: Check whether LAC and cell code at the MSS side are configured consistently with those at the BSS side. If abnormal, please modify it. Otherwise please proceed with the next step.
Page 147: Figure 68 Aem Fault Locating Flow
Whether the CMM Replace the CMM module indicator is normal Whether the SWR level-1 alarm indicator on the AEM module panel is on Remove the fault of the antenna feeder system Confidential and Proprietary Information of ZTE CORPORATION...
Page 148: Poor Conversation Quality At Bs
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 6. Troubleshooting Check the time when the alarm occurs and carefully observe whether the minor alarm of the standing wave ratio occurs at the same time. If yes, see whether the AEM needs to be replaced considering fault may occur at the test circuit of the standing wave ratio.
Page 149: Figure 69 Fault Locating Flow Chart For Poor Conversation Quality Faults
Whether the clock replace the CMM is normal Whether the E1 Correctly set the E1 DIP switch of the DIP switch CMM is set correctly Whether there Adjust the frequency exists co-frequency point data interference Confidential and Proprietary Information of ZTE CORPORATION...
Page 150 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 6. Troubleshooting View the signal intensity of the MS. If the intensity is low, the receiving level is too low. Follow the steps below to eliminate the faults. Check whether the RF cable between the ETRM and the AEM is connected normally.
Page 151: Troubleshooting In Bs Maintenance Stage
The following factors will influence the coverage of the BS: Too low power amplifier output, decreased receiver sensitivity, inclined azimuth angle, changed antenna pitch angle, changed gain and height, feeder cable or combiner loss, changed working frequency and transmission environment and diversity reception. Confidential and Proprietary Information of ZTE CORPORATION...
Page 152: Figure 70 Fault Locating Flow Chart Of Shrinkage Of Bs Coverage
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 5. Fault locating flow is as shown in Figure 70. 7 0 F B S C I G U R E A U L T O C A T I N G...
Page 153 Check whether the receiving sensitivity of BS is normal. Confidential and Proprietary Information of ZTE CORPORATION...
Page 154: Cell Carrier Not Occupied
For the above three symptoms, the respective causes that make the carrier not occupied are: According to the TCH assignment algorithm of the ZTE BSC, if a time slot is assigned unsuccessfully, the priority of the time slot will be decreased and other carrier slots will be firstly assigned in the next assignment.
Page 155: Figure 71 Fault Locating Flow Chart For Cell Carrier Not Being Occupied
If the PA output power of the carrier is lower than that of other carriers, adjust the power control. If the fault still stays there, consider replacing the ETRM. If the ETRM functions well, check Confidential and Proprietary Information of ZTE CORPORATION...
Page 156: Lapd Broken-Link Of Bs Carrier
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual whether the receiving RF cables of the two RX of ETRM are properly connected with the RF combiner. v. If the carrier is still not be occupied after other carriers are blocked, it is necessary to go to the site to check whether the RF cable between ETRM and AEM is firmly connected.
Page 157: Figure 72 Fault Locating Flow Chart For Carrier Lapd Broken-Link At A Site
CMM of the BS is broken. ii. Check whether the alarm occurs at all FUCs in the BS. If yes, follow the steps below to eliminate the fault: Check whether the E1 line is correctly connected. Confidential and Proprietary Information of ZTE CORPORATION...
Page 158 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual If yes, check whether alarms occur at the TIC board, LAPD board and BOSN board. If yes, eliminate the corresponding faults. Implement transmission self-loop at the BSC side. If the alarm of the LAPD broken-link disappears, the BSC-side equipment is normal.
Page 159: Figure 73 Fault Locating Flow Chart For Wide-Spread Transient Interruption Of Bs Carrier Lapd
The system will automatically become normal without any handling if the LAPD interruption is caused by resetting the CMM. 7. Precautions Check the attributes of related carriers in equipment configuration to judge whether the carriers are of the same LAPD board. Confidential and Proprietary Information of ZTE CORPORATION...
Page 160: Figure 74 Fault Locating Flow Chart For Lapd Board
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Faults in a LA PD Board 1. Symptom Broken links occur on the carrier LAPD of some base stations at the same time, and no alarms occur in BSC and related base stations.
Page 161: Bs In Normal Status But Bs Handover Is Abnormal
4. Fault analyzing and locating Data or hardware faults may trouble the handover of the mobile phone. Adjacent cells are improperly set. ii. Improper handover parameter settings. iii. Deviation occurs in the BS clock. Confidential and Proprietary Information of ZTE CORPORATION...
Page 162 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 5. The fault locating flow is as shown in Figure 75. 7 5 F I G U R E A U L T O C A T I N G...
Page 163: Handling Lightning-Stricken Bs Faults
The fault is caused by board faults from the lightning strike. Experience shows that the faults caused by lightning strike include: Damaged -48 V BS power supply. ii. Damaged BS transmission. iii. Damaged BS CMM module. iv. Damaged CMM backplane. Confidential and Proprietary Information of ZTE CORPORATION...
Page 164: Figure 75 Fault Locating Flow For A Normal Bs But With Abnormal Bs Handover. 148 Figure 76 Fault Locating Flow Chart For Lightning-Stricken Bs
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 5. The fault locating flow is as shown in Figure 76. 7 6 F I G U R E A U L T O C A T I N G...
Page 165: Ms Signal Is Not Stable In Idle State
ETRM to AEM is unreliable, the transmission power of the ETRM will be unstable which will result in the unstable phone signal. iii. Cell reselection leads to the change of signal receiving intensity of the mobile phone. Confidential and Proprietary Information of ZTE CORPORATION...
Page 166: Figure 77 Fault Locating Flow Chart For Unstable Ms Signal In Idle State
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 5. The fault locating flow is as shown in Figure 77. 7 7 F M S S I G U R E A U L T O C A T I N G...
Page 167: Unstable Ms Signal In Conversation
Remove the occur at some timeslots power supply of a certain carrier fault Reset the TRM Reliably connect Whether the the TRM-AEM TRM-AEM RF cable RF cable is reliably connected Replace the TRM module Confidential and Proprietary Information of ZTE CORPORATION...
Page 168: Tch Assigned With Low Success Ratio And Calls Are Difficult To Get Through
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 6. Troubleshooting Check whether the unstable signal occurs at some time slots of a carrier or multiple carriers in dynamic data management (or use a mobile phone to perform the on-site dialing test).
Page 169: Figure 79 Fault Locating Flow Chart For Low Tch Assignment Success Ratio And Phones Being Difficult To Get Through
Whether the fault is solved Replace the AEM module 6. Troubleshooting Select an appropriate time when the traffic is not too large or too little to block all TCHs of other carriers except one TCH in dynamic Confidential and Proprietary Information of ZTE CORPORATION...
Page 170: Ms Echo During Conversation
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual data management by blocking the logic channels. Observe whether the calls can be made normally and check them in turn until the faulty ETRM and TCH are located. ii. If alarms occur, handle the fault according to the alarm information.
Page 171: Figure 80 Fault Locating Flow Chart For Ms Echoes In Conversation
Try replacing the ETRM. v. Check whether alarms appear in DRT (EDRT) at BSC side, if yes, reset the board. If ineffective, try replacing the DRT (EDRT) board. 7. Precautions None. Confidential and Proprietary Information of ZTE CORPORATION...
Page 172: Troubleshooting In Bs Cutover And Expansion Stages
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Troubleshooting in BS Cutover and Expansion Stages Unidirectional Mobile Phone Calls 1. Symptom Unidirectional call occurs to mobile phones. 2. Source Faults occur in dialing. 3. Related parts The configuration data of MSC, BOSN board of BSC, ETRM and AEM modules.
Page 173: Figure 81 Fault Locating Flow Chart Of Unidirectional Mobile Phone Calls
Confirm whether the symptom appears within the area covered by a certain BS. If yes, check the wireless parameters of the cell such as whether the maximal transmission power of the mobile phone is Confidential and Proprietary Information of ZTE CORPORATION...
Page 174: Sdcch Occupied Too Long
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual correct. And then use the mobile phone for test to perform on-site dialing test. Check whether a time slot of a carrier is occupied constantly and is irrelevant to the specified time slot when unidirectional get-through occurs.
Page 175: Figure 82 Fault Locating Flow Chart Of Sdcch Being Occupied Too Long
(cell reselection hysteresis) to 6 or 7 (the reselection hysteresis level is 12 dB or 14 dB). That is, only when the signal level of the adjacent cell (the location area is different from the current area) is Confidential and Proprietary Information of ZTE CORPORATION...
Page 176 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 12 dB or 14 dB greater than that of the current cell, does MS start the cell selection. Adjust the ratio of SDCCH with TCH and add SDCCHs if it does not produce distinct effects.
Page 177: Call Drop Rate In Cell Rises Suddenly
Generally, faulty frame unit will influence the assignment failure ratio and uplink/downlink quality switchover. When the receiving part gets faulty, the assignment failure ratio and uplink/downlink quality switchover will be influenced. When the transmitting part Confidential and Proprietary Information of ZTE CORPORATION...
Page 178 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual gets faulty, the assignment failure ratio and uplink quality switchover will be influenced, resulting call drop. viii. Interference (co-frequency and co-color-codes). Severe bit errors will occur when MS receives strong interference...
Page 179: Figure 83 Fault Locating Flow Of Sudden Rising Call Drop Rate In A Cell
Whether the antenna Adjust the antenna feeder system is direction angle and changed the elevation angle Adjust the Whether there exists frequency point co-frequency data interference Confidential and Proprietary Information of ZTE CORPORATION...
Page 180 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 6. Troubleshooting Check the operation record to confirm whether parameters that influence the network running are modified recently, such as the handover parameter, the parameter of the adjacent cell and power control parameter.
Page 181: Chapter 7
Collection of Maintenance Experience In this chapter, you will learn about: Reference for wireless parameters adjustment during commissioning Analysis of bird928 mobile phone’s failure to access the network Configuration method for intra-cell handover Confidential and Proprietary Information of ZTE CORPORATION...
Page 182: Reference For Wireless Parameters Adjustment During Commissioning
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Reference for Wireless Parameters Adjustment during Commissioning Adjusting List of Adjacent Cells and List of Carrier-Sense Frequencies At places where dual band networks are not used, such as the Liu’an...
Page 183: Figure 84 Sites Distribution
As a result, between cells of different frequency bands, the cell reselection is available and cell handover is unavailable. Confidential and Proprietary Information of ZTE CORPORATION...
Page 184: Adjusting Wireless Parameters
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual When the second step is also performed stably, cautiously consider adding the cells of different frequency bands into their respective lists of adjacent cells. As a result, the dual band handover can be performed between the adjacent cells of different frequency bands.
Page 185: Others
The first case is easy to be found while difficult to be solved. Consider enhancing the transmitting power to solve this problem. The second case needs renewing the frequency plan or decreasing the Confidential and Proprietary Information of ZTE CORPORATION...
Page 186: Analysis Of Bird928 Mobile Phone's Failure To Access Network
Network According to the report from the operation site, the Bird928 mobile phones with certain versions cannot update the location in the ZTE BS and the users of these mobile phones can not enjoy the relevant services; while the Bird928 mobile phones with some other versions work normally.
Page 187: Table 21 Corresponding Relationship Between Power Control Level Of Gsm900
33dBm, so many BSs of different producers require the mobile phone should access the network at power control level 5 in instant assignment. As a result, some defective mobile phones can also work normally. Confidential and Proprietary Information of ZTE CORPORATION...
Page 188: Configuration Method For Intra-Cell Handover
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Configuration Method for Intra- Cell Handover The basic method to generate the intra-cell handover is to reduce the communication quality of the TCH being used by the MS to make MS handover to other TCHs.
Page 189: Replacement Of Modules And Parts
During module replacement, the equipment room maintenance personnel are recommended to contact the relevant technicians or ZTE local maintenance staff for technical support and guidance. Pay attention to the following principles during the replacement of modules and parts: 1.
Page 190: Cmm Replacement
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 5. When installing the feeder jumper, insert the connector of the feeder jumper into the socket of the AEM module and tighten the connector by hand. 6. Label the cause of the faulty modules and put the faulty modules in anti-static bags in different categories.
Page 191: Etrm Replacement
According to the slot specified on the plug-in box, insert the spare part of the module into the plug-in box. Push the module with Confidential and Proprietary Information of ZTE CORPORATION...
Page 192: Aem Replacement
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual proper force until it is in the proper location, and then fasten the fix screws. vii. Power on the ETRM module again. 4. Confirmation after replacement When the module is just powered on, there is a self-test process for some time.
Page 193: Psm Replacement
Put the replaced faulty board in an anti-static damp-proof bag, label it and mark the module type, slot number, program version Confidential and Proprietary Information of ZTE CORPORATION...
Page 194: Power Lightning Protection Module Replacement
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual and fault. Store the faulty modules properly in the carton. Label the carton for easy identification and handling in the future. vi. According to the name of the spare PSM module, push it into the layer where PSM is located.
Page 195: Backplane Replacement
Loosen the screws fixing the backplane by using a cross screwdriver to put down the backplane. There are many cables inserted in the inner side of the backplane. Record cable locations Confidential and Proprietary Information of ZTE CORPORATION...
Page 196: Heat Exchanger Replacement
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual and unplug these cables. Make sure to slightly pull cables towards the operator to prevent them from dropping outside the frame. v. There is a DIP switch on the MTRM backplane to mark the physical location of the frame at this layer.
Page 197: Trunk Cable Replacement
Test the new trunk cable with a multimeter to see whether the circuit is through and whether there is any interrupted circuit or short circuit. v. Prepare a damp-proof bag and carton, as well as some labels for identification. Confidential and Proprietary Information of ZTE CORPORATION...
Page 198: Rf Cable Replacement
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 3. Procedure Cut the cable clip of the trunk cable to be replaced, and unplug the old trunk cable from the E1 PORT at the bottom of the cabinet. Note: Never forcibly pull when taking out the old trunk cable.
Page 199: Antenna Feeder Lightning Arrester Replacement
Slip joint pliers iii. Adjustable wrenches iv. Multimeter v. Antenna feeder analyzer (SITE MASTER) 2. Preparation Perform the fault observation and analysis and determine the fault and whether it is necessary for a replacement. Confidential and Proprietary Information of ZTE CORPORATION...
Page 200 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual ii. Check whether the type of the new lightning arrester is the same as that of the old one. Test the new lightning arrester through a multimeter to see whether it is normal.
Page 201: Cabinet-Bottom 1/2 Soft Jumper Replacement
Make the jumper safely and avoid the personal injury due to improper use of sharp tools. Pay attention to the handling of the feeder leftover. If sundries such as copper bits are filtered into the connector, the performance of the antenna feeder system will be influenced. Confidential and Proprietary Information of ZTE CORPORATION...
Page 202: Tower Top 1/2" Soft Jumper Replacement
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual vi. Connect the newly-made jumper. vii. At the other end of the jumper, measure the indexes of the antenna feeder performance by an antenna feeder analyzer (SITE MASTER). viii. If the indexes are normal, connect the jumper to the antenna feeder interface at the top of the cabinet.
Page 203 Observe the running status of the ETRM and the AEM. If the indicator is normal, the replacement is basically successfully. ii. Make a test call to check whether the BS runs normally after the replacement. Confidential and Proprietary Information of ZTE CORPORATION...
Page 204: Feeder Connectors Replacement
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Feeder Connectors Replacement 1. Tools LDF4 block cutting device ii. LDF4 block installation tools iii. Adjustable wrenches (2) iv. Hacksaw v. Assorted file vi. Paper knife vii. Adjustable hot air blower viii.
Page 205: Tower Amplifier Replacement
Prepare a good spare part with the same type as that of the faulty jumper. iii. Prepare a damp-proof bag and carton, as well as some labels for identification. Confidential and Proprietary Information of ZTE CORPORATION...
Page 206: Antenna Replacement
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 3. Procedure Power off all the ETRM modules on the PSM module panel. ii. Strip off the 3-layer waterproof tape of the old tower amplifier by the paper knife and sharp nose pliers, and remove the old tower amplifier from the fixing clamp by the socket wrench.
Page 207 Install the directional antenna in the following way: Connect the jumper connector to the antenna connector and screw them, and then make waterproof treatment to the connectors and seal them. Confidential and Proprietary Information of ZTE CORPORATION...
Page 208 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Place the antenna feed point downwards and then temporarily fix the antenna and antenna supports by the antenna fixing clamp (not necessary to fix them firmly). Adjust the horizontal angle of the antenna in accordance with the design requirement, and then fix the antenna fixing clamp firmly.
Page 209: Common Maintenance Tables
A p p e n d i x Common Maintenance Tables Daily Maintenance Record Table Running Status of Site Site Operation the Equipment and Operator Remarks Name Item Handling Confidential and Proprietary Information of ZTE CORPORATION...
Page 210: Weekly Maintenance Record Table
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Weekly Maintenance Record Table Running Status of Site Site Operation the Equipment and Operator Remarks Name Item Handling Results Confidential and Proprietary Information of ZTE CORPORATION...
Page 211: Monthly Maintenance Record Table
Appendix B - Common Maintenance Tables Monthly Maintenance Record Table Running Status of Site Site Operation the Equipment and Operator Remarks Name Item Handling Results Confidential and Proprietary Information of ZTE CORPORATION...
Page 212: Biannual Maintenance Record Table
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Biannual Maintenance Record Table Running Status of Site Site Operation the Equipment and Operator Remarks Name Item Handling Results Confidential and Proprietary Information of ZTE CORPORATION...
Page 213: Emergency Failure Record Table
Time of handling Source: Reported by users on the call Alarm system Detected in daily routine maintenance Other sources Failure types Description of the Failure Handling method: Result: Opinion of the person in charge: Confidential and Proprietary Information of ZTE CORPORATION...
Page 214 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual This page is intentionally blank. Confidential and Proprietary Information of ZTE CORPORATION...
Page 215: Use Of Common Instruments And Meters
It can measure the data of the serving cell and six adjacent cells: Whether adopts the frequency hopping mode. ii. Channel type (service channel and dedicated control channel) iii. Receiving quality iv. TA v. BCCH occupied in communication status Confidential and Proprietary Information of ZTE CORPORATION...
Page 216: Operation Description
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual vi. Receiving level (dBm) 3. Special functions: Locking BCCH ii. Setting the SIM card information: iii. Accessing the cell with negative C1 value iv. Testing the field strength of the RF channel v.
Page 217: Figure 85 Root Menu
To return to the main menu, press C. 3. Menu 3: NETWORK (network data) This menu can display: In idle mode: it can display the BCCH of the serving cell and the network data of 6 adjacent cells. Confidential and Proprietary Information of ZTE CORPORATION...
Page 218: Figure 86 Screen 1 Of Network Data Of Serving Cell In Idle Status
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual ii. In call mode: it can display the network data of the serving cell and 6 adjacent cells. In call status, it can work with menu 6 to perform tracing test. In other words, for a call to any number, the screen will display the network data of the serving cell and the adjacent cells.
Page 219: Figure 88 Screen 3 Of Network Data Of Serving Cell In Idle Status
CELLVOIS: Adjacent cell code, ranging from 1 to 6. CH: RF channel number occupied by the BCCH of the adjacent cell, ranging from 1 to 124. Confidential and Proprietary Information of ZTE CORPORATION...
Page 220: Figure 90 Screen 1 Of Network Data Of Serving Cell In Communication Status
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual RX: Adjacent cell BCCE reception level, RX_LEV_NCELL, ranging from -110 dBm to -11dBm. Minimum reception threshold level adjacent cell, RX_LEV_ACCESS_MIN, ranging from -110 dBm to -46dBm. CI: Standard C1 value of adjacent cell, ranging from –92 to –99.
Page 221: Next Cell1 Ch: 0097
E R V I N G C E L L I N O M M U N I C A T I O N T A T U S NEXT CELL1 FN: +0 HBN: +6 STAT: 2 Confidential and Proprietary Information of ZTE CORPORATION...
Page 222: Cellvois: Adjacent Cell Code, Ranging From 1 To 6
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Continue to press “V” to turn the page down. Network parameters of 6 adjacent cells are displayed in total 12 screens continuously in communication mode, and parameters of an adjacent cell will be displayed in every two pages.
Page 223: Figure 94 Trace Menu
SET RF: Specify the RF channel and test the field strength level. SIM: Set the related information of the SIM card. 8 configurations are available for the SIM, as shown in Figure 95. Confidential and Proprietary Information of ZTE CORPORATION...
Page 224: Figure 95 Sim Menu
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 9 5 S I M M I G U R E E N U RLT/T3212 HANDOVER COUNTERS TMSI/CYPHR KC INFO: Define key KC. IMSI: Provide IMSI data. LOC INFO: Provide the location information.
Page 225: Engineering Test Mode Of Zte289 Mobile Phone
N = Top 6 size (Quantity of the adjacent cells) C = Channel configuration values / Time slot range (Common channel configuration) CCCH_1_CHANNEL = “CH1C” = 1 BCCH CCCH_2_CHANNELS =”CH2C”= 2 BCCHs CCCH_3_CHANNELS = “CH3C”= 3 BCCHs Confidential and Proprietary Information of ZTE CORPORATION...
Page 226 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual CCCH_4_CHANNELS = “CH4C”= 4 BCCHs CCCH_1_CHANNEL_WITH_SDCCH =“CH1S”= BCCH+SDCCH Screen 2: A = Absolute Radio Frequency Channel Number= Carrier frequency number C = Mobile Country Code (Country code) (China: 460) B = Base Station Identity Code (BS color code)
Page 227 DL= Downlink level Uplink DTX = Whether adopts dynamic power control for uplink Screen 2: A=Absolute Radio Frequency Channel Number (Frequency band number. If frequency hopping occurs, HOP is displayed) Hopping: HOP CHANNEL MODE: Confidential and Proprietary Information of ZTE CORPORATION...
Page 228: Bird Power Meter
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual CHM_SIGNALLING = ”CM-SIG” CHM_SPEECH_FULL_RATE = “SP-FR1” (The voice channel at the full speed) CHM_SPEECH_FULL_RATE_VER2 = “SP-FR2” CHM_SPEECH_FULL_RATE_VER3 = “SP-FR3” CHM_SPEECH_HALF_RATE = “SP-HR1” CHM_SPEECH_HALF_RATE_VER2 =”SP-HR2” CHM_SPEECH_HALF_RATE_VER3 =”SP-HR3” CHM_DATA_14400 = “D14400” CHM_DATA_9600 = “D9600”...
Page 229: Usage
Before you disconnect the lightning arrester and the unit top jumper to connect the power meter, first turn off the carrier power, to stop transmission. vi. After the power meter is connected, turn on the carrier power to resume transmission. Confidential and Proprietary Information of ZTE CORPORATION...
Page 230: Figure 98 Test Connection Of Power Meter
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 9 8 T I G U R E E S T O N N E C T I O N O F O W E R E T E R...
Page 231: Hp8954E Spectrum Analyzer
It can test all the indexes of the BTS transmitter and some indexes of the BTS receiver. Let’s take the HP8954E spectrum analyzer for example. Confidential and Proprietary Information of ZTE CORPORATION...
Page 232: Components
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Components The structure of the HP8954E spectrum analyzer is as shown in Figure 101. 1 0 1 S H P 8 9 5 4 E S I G U R E...
Page 233: Figure 102 Connection Diagram For Rf Measurement
(3) and SOFTKEYS (4) to find the target frequency value quickly, and read its level value (the total of the value shown on the current screen and reference level value) at the same time. Confidential and Proprietary Information of ZTE CORPORATION...
Page 234: Figure 103 Transmission Path Of Rf Signal
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual vii. MARKER DELTA in SOFT KEY LABELS (3) and SOFTKEYS can be used to read the difference between two PEAKs. And one MARKER should stay in PEAK, the other MARKER can be moved by KNOB, and then the frequency and level DELTA difference between two MARKERs can be read by the spectrum analyzer on-line.
Page 235: Figure 104 3 Db Bandwidth Of Signal
If it meets the requirement, “PASS” will be displayed on the upper right corner of the screen, otherwise, “FAIL” will be displayed, indicating tested signal does meet requirement. Confidential and Proprietary Information of ZTE CORPORATION...
Page 236: Antenna Feeder Tester (Site Master S332B)
ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 2. Perform relevant tests with the GSM test card. Insert a GSM card into MEMORY CARD READER SLOT (17), turn off the power of the spectrum analyzer and then restart it. After the...
Page 237: Test Procedure Of Dtf
And only one SWR, of connection location, can be peak value in the normal test results, if there are more SWR peak values, the cable in that location may have faults, such as break. Confidential and Proprietary Information of ZTE CORPORATION...
Page 238 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual This page is intentionally blank. Confidential and Proprietary Information of ZTE CORPORATION...
Page 239: Operation Maintenance Quality Indexes Of Certain Telecom Network (Wireless Part)
G3 = Total times of call loss in voice channel (TCH) in busy hour/Total utilization times (not including handover) of voice channel (TCH) in busy hour × 100% Confidential and Proprietary Information of ZTE CORPORATION...
Page 240 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual 4. Congestion rate of the radio system of the Unicom mobile network in busy hour. G4 < 5 % G4 reflects the congestion situation of the signaling channel (SDCCH) and voice channel (TCH) of the radio system of the Unicom GSM mobile network, with the radio subsystem of the local network as the statistics point.
Page 241: Abbreviations
Calling Control Channel Common Channel CELL Cellular CELP Code Excited Linear Prediction Coding Channel Processor Carrier to Interference Ratio Carrier Interface Part Clock Communication Management Controller & Maintenance Module Circuit Switched Carrier Unit Data Base Confidential and Proprietary Information of ZTE CORPORATION...
Page 242 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Abbreviation Full Name Data Base Subsystem DLCI Data Link Connection Identifier Discontinued Receiving Digital Signal Processor Discontinuous Transmission External Alarm Module ECDU “E” Combiner Distribution Unit EDGE Enhanced Data rates for GSM Evolution...
Page 243 Packet Common Control Channel Paging Channel Pulse Code Modulation Packet Control Unit PLMN Public Land Mobile Network PDCH Packet Data Channel Power Distribution Module Packet Data Network PDTCH Packet Data Traffic Channel Protocol Data Unit Confidential and Proprietary Information of ZTE CORPORATION...
Page 244 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Abbreviation Full Name Phase Lock Loop PNCH Packet Notification Channel PPCH Packet Paging Channel PRACH Packet Random Access Channel Power Supply Packet System Information PTCCH Packet Timing advance Control Channel...
Page 245 Abbreviations Abbreviation Full Name Transceiver Process Unit Transceiver Module Transceivers Time Slot Transmitter Uplink State Flag Voltage Control Oscillator Visitor Location Register VSWR Voltage Standing Wave Ratio Confidential and Proprietary Information of ZTE CORPORATION...
Page 246 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual This page is intentionally blank. Confidential and Proprietary Information of ZTE CORPORATION...
Page 247: Figures
Figure 46 Alarm Frequency Statistics – Showing Statistics Result in a Graph ..47 Figure 47 Performance Report Wizard ............49 Figure 48 Select NM Domain and Report Type ..........49 Figure 49 Performance Report Wizard 1............50 Figure 50 Please Select Analyzed Objects ............50 Confidential and Proprietary Information of ZTE CORPORATION...
Page 248 ZXG10 BS21 (V2.2) Compact Outdoor BTS for GSM Maintenance Manual Figure 51 Performance Report Wizard 2............51 Figure 52 Please Select Time (Month) ............51 Figure 53 Select Start and Stop Date ............52 Figure 54 Monthly Report Display Result............52 Figure 55 Performance Report Wizard 1............53 Figure 56 Bad Cell Report................54...
Page 249: Tables
Table 20 Corresponding Relationship between Nominal Maximum Output Powers of GSM900 Mobile Phone and Power Types..........172 Table 21 Corresponding Relationship between Power Control Level of GSM900 Mobile Phones and Nominal Output Power ..........173 Confidential and Proprietary Information of ZTE CORPORATION...

Zte ZXG10 BS21 Maintenance Manual

About this Maintenance Manual

Chapter 1

Maintenance Security

Chapter 2

Maintenance Overview

Chapter 3

Routine Maintenance

Chapter 4

Notification and Handling

Chapter 5

Alarms and Handling

Chapter 6

Troubleshooting

Chapter 7

Collection of Maintenance Experience

Appendix A Replacement of Modules and Parts

Appendix B Common Maintenance Tables

Appendix C Use of Common Instruments and Meters

Appendix C - Use of Common Instruments and Meters

Quick Links

Maintenance Manual

Troubleshooting

Need help?

Questions and answers

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Summary of Contents for Zte ZXG10 BS21