Preface In pursuit of the idea “First-class service, Customer service”, and in order to make more profits and provide better services for our customers, we have edited Maintenance Experience (Issue 265) for microwave products of ZTE, which includes 12 articles about maintenance cases. With the wide application of microwave products of ZTE, routine maintenance, a major job of the technical maintenance personnel of operators, has become more and more important. This issue, which collects articles written by microwave technical personnel of ZTE, describes practical cases and corresponding solutions that are often met during the commissioning and maintenance procedure. We hope it will be helpful to your routine maintenance work. For more articles of maintenance experience and related technical materials, please log in to ZTE technical support website http://ensupport.zte.com.cn. If you have any requirement, question, or suggestion, please feel free to contact us. Your attention and support are greatly appreciated. Maintenance Experience Bimonthly for Microwave Products No.15 Issue 265, September 2011 Maintenance Experience Editorial Committee Director: Qiu Weizhao Deputy Director: Huang Dabin Editors: Fang Xi, Wang Zhaozheng, Xu Xinyong, Xiao Shuqing, Zhang Jian, Zhang Jiebin, Zhou Guifeng, Zhao Cen, Zhao Haitao, Jiang Haijun, Xu Zhijun, Huang Ying, Ge Jun, Dong Yemin, Dong Wenbin Technical Senior Editors: Luo Liming, Chen Hui, Zhu Linlin Executive Editor: Wang Zhao Maintenance Experience Editorial Committee ZTE Corporation September 2011 Maintenance Experience Newsroom Address:No. 55, Hi-tech Road South, ShenZhen, P.R.China Post code: 518057 Contact: Ning Jiating Tel: +86-755-26776049 Fax: +86-755-26772236 Document support Email:
[email protected] Technical support website: http://ensupport.zte. com.cn .............. ......................21 ZXMW SR10 S340 Allows Frequency Modification at Both Local and Remote Ends......................................................................2 Incorrect Antenna Direction Causes Interruption.................17 ZXMW NR8250 Site Interruption.........18 ZXMW SR10 XPIC Function Failure.14 Migration of Microwave Network Element Management System................ ................................................................ ..........................................................................................................................4 ZXMW SR10 S340 Layer-2 Switching Function and Ethernet Data Service Fault.....................................................................22 ..........................................................5 NetNumen U31 Server Fails to Start Due to Change of IP Address...............................................................................Contents ZXMW S500 Microwave NE Is Displayed as Disconnected on NetNumen R31 Client...................................19 NR8250 Multi-Directional Parameter Configuration........13 ZXMW SR10 I200 Code Error........10 Link Disconnection due to Inconsistent Working Modes at Both Ends............................................................................................................. ................................................................................15 Mismatching Soft Waveguide and Feeder Interface Leads to Water Entry............................................. manages and monitors microwave NEs. Whether the network cables are correctly made. namely. the NetNumen R31 EMS fails to monitor four microwave links. Equipment Connection Maintenance Experience . Whether the equipment is powered on. Whether the IP configuration is correct. Version: NetNumen R31 Symptoms In a Cell-C project. 4041—4099. Figure 1. as shown in Figure 1. and 4099—8311. 4099—4113. This article describes how to handle the out-of-control fault of ZXMW S500 on the NetNumen R31. developed by ZTE Corporation.September 2011 Issue 265 ZXMW S500 Microwave NE Is Displayed as Disconnected on NetNumen R31 Client ⊙ Wan Tao / ZTE Corporation Abstract: NetNumen R31 Network Element Management System (EMS). 4099—4178. Whether the EMS port has faults. Analysis and Troubleshooting Check the following items: Whether the hardware connection is proper. Whether the IDU version is correct. Therefore. After the synchronization is completed. and 4099 8311. the other sites cannot be pinged through and the synchronization fails. go to the site and check the network cable itself and the cable connection. 4009 4178. The IP address of site 4011 is 192. port connection. Return to the equipment room and synchronize the NEs out of control on the EMS. Summary The out-of-control of microwave NEs on EMS may be caused by many reasons. Also. the problem is not caused by device power-down. use the Ping command to test sites 4041 and 4099 and get responses. Go to site 4099 and check the following items: The result shows that the network cable between IDU (4099 4041) and IDU (4099 4113) is faulty. If the problem cannot be solved. hot restart is also an effective method. The circuits work normally. IP configuration. 4. This indicates that sites 4041 and 4099 can be connected. Correct EMS Cable Connections Troubleshooting 1.45 and that of 4099 is 192. Microwave Products .com. 5.zte. The ping commands succeed. Make a new network cable and use the Ping command to check the IP addresses of the devices 4099 4113. For ZXMW S500.168.www. Check the historical alarms on the EMS and find that there is no alarm for the four microwave links. The fault is removed.20.177.cn Figure 2.20. check the EMS server first. If such a fault occurs. the link 4041—4099 restores and can be monitored. ■ Whether the EMS cables are properly connected as shown in Figure 2. BSC engineers confirm that the BTS devices operate properly.168. Manually synchronize the NE clock of site 4099. 3. and others. Whether the device IP configuration is consistent with that of the EMS client. 2. Whether the network cables are correctly made. However. On the EMS server. and find that the receiving level at the other end has no obvious change.0. Troubleshooting 1.0. The link disconnection may be caused by interference.September 2011 Issue 265 Incorrect Antenna Direction Causes Interruption ⊙ Feng Peixuan / ZTE Corporation Version: ZXMW SR10 S200 V2. The link restores normal. 2. interference.22) Keywords: Antenna azimuth. two microwave links have normal receiving level but are disconnected. Thus.00 (6. Antenna Direction Diagram Maintenance Experience . Check the antenna azimuth and adjust the antennas. This indicates that the antenna azimuth may be improper. Normal receiving level indicates that the interference signal is strong. Figure 1.2. when commissioning each microwave hop. 3. ■ Analysis The two microwave links are installed at the same time and have normal receiving level. as shown in Figure 1. Therefore. and find that the receiving level at the other end also has no obvious change. carefully check the azimuths according to the design. Power off the device at one end of the second hop. antenna directions may be incorrect.6. Summary If two or more microwave hops are commissioned on site and the antenna azimuths are close with each other. the most probable reason is that the antenna directions are incorrect. Power off the device at one end of the first hop. This means that the two microwave links can receive signals. antenna adjustment Symptoms In a Cell-C project. 126 10.255.231 GW IP for UMTS FE MASK:255. Layer-2 switching function. CCM message. Topology Graph Between Faulty Site Gonzallilo 2 and Optical Node Table 1. MAID.255.148 10.221.215 10.84.84. Trunk Symptoms As an extension of optical transmission.00 (6.84. troubleshoot the Ethernet service between the optical node and Node B and find that RNC cannot ping the Node B at site Torrijos Carter.221. Node B VLAN Configuration Table of Optical Node San Miguelito NodeBNAME Torrijos Carter Villa Zaita CD Torrijos Carter Gonzalillo 2 VLANID 127 20 24 291 IP for UMTS FE MASK:255.com.84. Version: ZXMW SR10 S340 V2. It provides a reference for solving the problem of Ethernet data service fault when data exchange is implemented through S340 layer-2 switching function. microwave transmission connects a remote site to an optical node. Figure 1. The topology graph from site Torrijos Carter to the optical node San Miguelito is shown in Figure 1.1ag.228 Microwave Products . MEP/MIP.0.cn ZXMW SR10 S340: Ethernet Data Service Fault over Layer-2 Switching Function ⊙ Zhang Jinwu/ ZTE Corporation Abstract: This article is about ZXMW SR10 S340 R2.240 10.zte.221.84.0.www.221. Table 1 describes the configuration.255.221.84.149 10. ID Access.240 10. In case that the RNC and UMTS Node B are disconnected.2.6.06.221.116 10.255.212 10.221.030c P0001 Keywords: 802.221.22-1) EMS Version: NetNumen R31 V1. if the site has no switch.84. Exchange of data between the remote site and the optical node is implemented by S340 R2.84. Adding Local MEP@San Miguelito Maintenance Experience . Set the IP address of the PC to 10.116 of VLAN 291 gateway and get the response. Port 3 (connected with Node B) of site Torrijos Carter is in Trunk Mode (Allow VLAN 1.84. the problem is located in the related ports or BBU interface board. as shown in Figure 3. 2. 3. On the RNC.221. and get response. 2. Log in to the IDU of optical node San Miguelito. The VLAN ID of point-to-point port must be consistent with the level. Choose Service OAM > MAID list.221. Other related ports all have VLAN 127 access. Adding Local MEP@T Carter Figure 3. Find a port not in service on the Nodal of the optical node San Miguelito. Adding a Maid List for Optical Node San Miguelito Troubleshooting Determine the working status of pointto-point port. Click Add to add a new Maid List. Ping IP address 10. Log in and check the Ethernet port configuration.100/28 and connect it to the Access 127 port. Use the 802. Ping IP address 10.123.84. and set it to Access 127 port. ping the other three sites. and Gonzallilo2 on the same optical transmission channel. Click Add to add a new Maid List. Log in to the IDU of optical node San Miguelito.221. Choose Service OAM > MAID List. Choose Service OAM > MAID List. and the response times out. CD Torrijos Carter. Log in to the IDU of site T Carter. 127). Figure 2. as shown in Figure 2. Click 3G FE T Carter Maid in Figure 4. Villa Zaita.1ag layer-3 switch fault locating protocol on S340 and troubleshoot as follows: 1. This indicates that the optical transmission is normal. 3.84.September 2011 Issue 265 Analysis 1. Thus. Log in to the IDU of T-Carter. Adding Remote MEP@T Carter Microwave Products . 6. unique in a Maid List. 5. as shown in Figure 6. Level: consistent with the Level in Maid List VLAN ID: consistent with the VLAN ID in Maid List Ethernet Port: The port to be tested. Choose > MAID List.cn Maid List. and click Add in Remote MEP to add the remote MEP. Local MEP ID: Allocated ID. Adding Remote MEP@San Miguelito Figure 6. as shown in Figure 4. Click 3G FE T Carter Maid in Maid List. Port 3 of San Miguelito 3 is connected with optical transmission ADM.com. Direction: UP stream Priority: The priorities of the local end and remote end must be the same. Choose Service OAM > MAID List. Click 3G FE T Carter Maid in Maid List. and click Add in Local MEP to add the local MEP.zte. 4. as shown in Figure 5. Choose Service OAM > MAID List. Figure 5. and click Add in Local MEP to add the local MEP.www. Log in to the IDU of site T Carter. Click 3G FE T Carter Maid in Maid List. The range is 1-8191. as shown in Figure 3. Log in to the IDU of site San Miguelito. and click Add in Remote MEP to add the remote MEP. as shown in Figure 7. 8. click the button shown in Figure 9 to ping the MAC address. as shown in Figure 10. choose Service OAM > MAID List . If the link and interface are normal.September 2011 Issue 265 7. Alternatively.1ag Function in Monitoring State Figure 9. the ping command succeeds. 802. Select Enable for periodical CCM message sending. The two ports become normal in Monitoring state in the path. Log in to the IDUs of San Miguelito and T Carter respectively. Activating CMM Message Sending Function Figure 8. Ping Remote MAC Address Maintenance Experience . Choose > MAID List. Figure 7. After step 7 is performed at the both local and remote ends. Click 3G FE T Carter Maid in Maid List . as shown in Figure 8. and then click Apply. zte. that is. the problem can be solved. Notify Node B engineers to replace the BBU interface board. Result of Pinging Remote MAC Address Microwave Products .www. The fault can be located to the end point. the Ethernet service and TDM service have corresponding maintenance and diagnosis functions. The fault can be located layer by layer till the root. Then. make use of the S340 R2 maintenance function by referring to the transmission topology graph.com. ■ Figure 10. To solve similar faults. BBU. for ZXMW SR340 R2.cn Summary Currently. bash-3. The customer requires modifying the host name and domain name.010d Keywords: Change server IP address.10. Version: ZXMW NR10 8250 (1. Analysis 1. Check the database connection. Check the database listener. Select Database Configuration > Database Connection Configuration.00# . The command line interface is opened. 2.sh Figure 1. In the right pane. ZXMW NetNumen U31 V12. UEP’s DB Config Dialog Box The dialog box shown in Figure 1 appears. Run the following commands: bash-3.00# cd U31R58/EMS\ (030dP003\)/uif/ bash-3. Run the following command to switch to user Oracle: # su oracle Enter the command for starting the database listener.September 2011 Issue 265 NetNumen U31 Server Fails to Start Due to Change of IP Address ⊙ Wang Liang / ZTE Corporation Abstract: This article describes how to solve the problem of NetNumen U31 startup failure due to change of server IP address. as shown in Figure 2. fail to start Symptoms A NetNumen U31 server works normally after installation. enter the new IP address in the Database IP or hostname field. After the server IP address is changed. the NetNumen U31 fails to start.0001). Start the U31 configuration management platform under directory /uif. The following dialog box pops up.00$ lsnrctl start 10 Maintenance Experience . Click Test DB Connection./runPlugCenter.00. Right-click in the blank area of the desktop and select Open Terminal from Figure 2. This indicates that the database connection fails. Message Box the shortcut menu. Production on 1991.Production on 20-JUN-2011 Copyright (c) 1991.154.cn The system output is as follows: LSNRCTL 10:08:10 for Solaris: Version The system output shows that the listener fails to start.128.ora and tnsnames. find files listener.1.www. The messages in blue shows that the IP address for connecting the database listener is: HOST=10.0 .1.com.log app/oracle/product/10g/network/log/ Listening on: (DESCRIPTION=(ADDRESS=(P ROTOCOL=ipc)(KEY=EXTPROC1))) Error listening on: (DESCRIPTION=(ADDR ESS=(PROTOCOL=TCP)(HOST=10..ora Log messages written to /oracle/u01/ listener.2.zte.1. which is different from the modified IP address 10. and double-click them.. Under directory / oracle/u01/app/ oracle/product/10g/network/admin.0 .ora.146.128.145. 2005. All rights reserved.. 2005. See the error message(s) above.. the oracle listener needs to be modified.154. Therefore. Oracle. 3. as the messages in red shows. oracle/product/10g/bin/ /oracle/u01/app/ Figure 3. Save the file and exit. Oracle. Starting TNSLSNR All product/10g/bin/tnslsnr:please wait. Enter the following command: $ lsnrctl start The system output is as follows: LSNRCTL for Solaris: Version 20-JUN-2011 11:26:55 Copyright Starting (c) 10.154. Modify the listener program.0. change the HOST value to the new IP address of the server.146 )(PORT=1521))) TNS-12545: Connect failed because target host or object does not exist TNS-12560: TNS:protocol adapter error target host or object does not exist requested address TNS-00515: Connect failed because Solaris Error: 126: Cannot assign Listener failed to start.128.2. 10.2. rights reserved. The reason is that the target host or object does not exist.0 .Production for Solaris: /oracle/u01/app/oracle/ Version System parameter file is /oracle/u01/ app/oracle/product/10g/network/admin/ listener. Modifying Listener IP Address Microwave Products 11 .0.0. As shown in Figure 3. 10. . 10. the dialog box shown in Figure 4 pops up: This indicates that the U31 is connected with the database. After that..0. 4.. Message Box 12 Maintenance Experience .. status DRESS=(PROTOCOL=ipc)(KEY=EXTPR Listening on: (DESCRIPTION=(AD 28. 0 off Trace Level Security SNMP Authentication OFF ON: Local OS Troubleshooting This fault is removed after the HOST value in the listener.1. database backup and restoration cannot be implemented.0 .154. has 1 handler(s) for this service.ora Log messages written to c)(KEY=EXTPROC1))) (DESCRIPTION=(ADDRESS=(PROTOCOL=ip (DESCRIPTION=(ADDRESS=(PROTOCOL=tc oracle/u01/app/oracle/product/ / p)(HOST=10. the U31 can normally back up and restore data.0 . Summary After a server IP address is changed.2. "PLSExtProc" has 1 oracle/u01/app/oracle/product/ 10g/network/log/listener..154.145)(PORT=1521))) Services Summary.ora file under directory / oracle/ u01/app/oracle/product/10g/network/admin is modified..128.1 Connecting to (DESCRIPTION=(AD OC1))) The last message indicates that the listener starts successfully. The command completed successfully Instance "PLSExtProc". Because the network service name is not created. corresponding modifications should be implemented on the database.Production Start Date 20-JUN-2011 11:26:55 Uptime sec 0 days 0 hr. DRESS=(PROTOCOL=IPC)(KEY=EXTPR STATUS of the LISTENER Alias LISTENER --------------------------Version TNSLSNR for Solaris: Version 10.. ■ Figure 4.145)(PORT=1521))) DRESS=(PROTOCOL=tcp)(HOST=10. Listener Parameter File oracle/u01/app/oracle/product/ 10g/network/admin/listener. After the database connection test is conducted.log Listening on: (DESCRIPTION=(AD OC1))) UNKNOWN. 0 min. Service instance(s).ora Listener Log File / / oracle/u01/app/oracle/product/ 10g/network/log/listener.2.log Listening Endpoints Summary. Create the network service name. Run the U31 configuration center again..0.September 2011 Issue 265 tnslsnr: please wait.Production TNSLSNR for Solaris: Version System parameter file is / 10g/network/admin/listener.1. that the working modes at both ends are different. the background has no available path. link disconnection Symptoms During the debugging of a one-hop 8250 device. One is 4E1+14M+16QAM and the other is 8E1+14M+16QAM. Modify the configurations at both ends. Therefore.cn Link Disconnection due to Inconsistent Working Modes at Both Ends ⊙ Liu Wo / ZTE Corporation Abstract: In an Indoset project. The background noise is normal and the IP addresses are within the same network segment.www. Also the E1 loopback may be faulty. 2. Version: ZXMW NR8250 V2. After E1 loopback is implemented. but one end cannot access the peer end after being closed. the microwave link is connected and the receiving level is normal. 3. After E1 loopback is performed. No interference is detected. ■ Analysis and Troubleshooting 1. Ensure that the configurations are correct on the operation interface. The problem is solved. and find that the value is normal. The device has no alarm. Check the microwave configuration and find Microwave Products 13 . Check the receiving level. the device may not access the peer end even through the receiving level is normal. 5. it is found that the receiving levels of both ends are normal.00 Keywords: Receiving level.zte. Summary For NR8250. the link is disconnected due to inconsistent working modes at both ends. the configuration consistency is important. 4.com. and serious interference should not have occurred. refresh. the receiving levels are normal. and lock the clock. which are -36 dBm and -38 dBm respectively at both ends. in case that code error occurs on I200. frequency scanning has been implemented before installation. If the clocks of the microwave devices on the same hop Summary I200 has many differences with other devices. there are error codes with 10-8 at one end and 10-6 to 10-8 at the other end. Different from other devices. Clock configuration is easy to be ignored during on-site configuration. If the clock is not locked. I200 allows clock configuration. code errors may occur. The frequency points to be used are designed according to the scanning result. code error may occur and communication quality is affected. Pay special attention during configuration and inspection. are not synchronized. check the clock configuration first. Therefore. Check the Metering and find that code error does not appear any longer.September 2011 Issue 265 ZXMW SR10 I200 Code Error ⊙ Liu Lei / ZTE Corporation Version: ZXMW SR10 I200 Keyword: Error Code Symptom After a device is installed. Analysis The problem of code error with normal receiving level is generally caused by interference. ■ 14 Maintenance Experience . However. Troubleshooting Check the clock configuration of the microwave device and find that both ends are set to Master and the clocks are not locked. Change the remote IDU to Slave mode. However. In this case.zte. the database should be migrated. With the increase of data in the database. Migration Symptoms The database of a microwave EMS server is installed on partition C. Version: ZXMW SR10 S200. Disk C Usage Microwave Products 15 . To solve this problem. Analysis The NetNumen R31 system is installed on partition C during installation.030cP001 Keywords: Database. this partition (10 G capacity) has no sufficient space to save the database.cn Migration of Microwave Network Element Management System ⊙ Liu Lei / ZTE Corporation Abstract: This article describes how to migrate a database to another hard disk when the hard disk of the microwave EMS server reaches the limit.06.com. With the accumulation of database files. the remaining space of partition C is reduced and partition C may be totally occupied. Figure 1 shows that partition C has only 130 M space available.www. ZXMW PR10 S400/500 EMS Version: R31V1. try the following methods: Figure 1. Periodically clean the database and delete the obsolete data. Summary The EMS software can be installed on partition C. Right-click Database and select Add to open the Add dialog box. 3. and UEP_PM). Find the three files under the database installation directory on partition C. ■ 16 Maintenance Experience . 5. Split the database. 4. After the files are added completely. and they operate properly. 6. Remove the database from the server and install the database on a hard disk with a large capacity. Perform the same operation on folders uep and UEP_PM. Migrate the database. 2. Troubleshooting The procedure for migrating the database is as follows: 1. uep. Do as follows: Log in to the database again. Start the NetNumen R31 server and client. for example.September 2011 Issue 265 1. 2. Add the newly saved database files (UEP_CAF-FM. This method requires the backup of database files. Add the database files. This indicates that database files are successfully saved on partition E. close the database. 3. Cut them to a new location. Log in to the EMS database as user sa. right-click folder UEP_CAF_FM and select Task > Split . This method cannot fundamentally solve the problem. Do as follows: In the database directory. However. it is not recommended to install the database on partition C either. partition E. As a result.com. This may lead to water penetration into the antenna feeder due to the aging of protection layer of the clue or tape. or manufacturer negligence. As a result. Antenna and ODU Connection Microwave Products 17 . Figure 2 shows the solution for antenna and soft waveguide connection. configuration.cn Mismatching Soft Waveguide and Feeder Interface Leads to Water Entry ⊙ Wen Daming / ZTE Corporation Version: ZXMW SR10 S340 V Keywords: Waveguide.zte. magnetic power is accumulated and cannot be sent out through the antenna and thus the link is disconnected. Figure 1. as shown in Figure 1. No Waterproof Ring Between Antenna Waveguide and Software Waveguide Troubleshooting Because the equipment installation is completed. ■ Analysis The contact surface of the two waveguide interfaces has no waterproof ring during installation and the equipment is commissioned. If no measure is taken. future maintenance will cost large work effort. The fault is caused by incorrect waveguide model standard configuration. Summary This problem is caused by configuration error Figure 2. microwave link may be disconnected. aged clue or tape fails to prevent water entry into the feed. it is recommended to use a roundrectangle waveguide convertor. As time elapses. link disconnection Symptoms The connection surfaces of the waveguide and the antenna feeder interface are bare without waterproof rings. The result is transmission interruption and frequent alarms about network service failure.www. 4.00. Troubleshooting Ask the customer to check the power cabinet and solve the unstable voltage problem. This proves the existence of voltage fluctuation. and determine that the problem is caused by the power supply rather than the IDU hardware. It is found no connector is loose and no feeder or device has water. Version: ZXMW NR8250 (1.000j) Keyword: Service Interruption Symptoms During the installation phase of a microwave project. It is found that the IDU was cold restarted for multiple times that day. The investigation shows that the problem is caused by frequent restarting of IDU. cold restart of site equipment is caused by power supply problems. 2. Check the IDU running logs. 3. Analysis To solve the problem. Check the IF cable connectors and the waterproofing effect. It is found that the voltage is normal. Summary In most cases. the microwave link is interrupted a second time after being restored from an interruption half a month before. the microwave link is interrupted twice a month. 6. Ask the customer to check the power supply equipment. Check the history records of the related BTS and find multiple voltage alarms.September 2011 Issue 265 ZXMW NR8250 Service Interruption ⊙ Li Changguo / ZTE Corporation Abstract: During the commissioning phase of a microwave project. such as power failure and unstable voltage. Go to the site and check the IDU voltage. 5. ■ 18 Maintenance Experience . which uses an Emerson power cabinet. which are -48V alarm (198092550) and -44V alarm (198092551). the following measures are taken: 1. thus causing service failures at six sites. Analyze the running logs and historical alarms. The customer feeds back that the power is normal. Then. Version: S300 (idc_swr_4.95s20) Keyword: XPIC Symptoms A ZXMW SR10 S300 microwave device is used in a project. enable the XPIC function. The site ID is re5007-52101. Connection of 522101 IF cables: The two IDM modules on the right are connected to a horizontally-polarized ODU. 3. Figure 1. To implement the XPIC function for an S300 device. the XPIC function cannot be implemented and alarms are generated. -32 dBm. the IDM modules with the same slot number must use the same IF connection mode.com. as shown in Figure 1. Therefore. The device configuration is 7G 2*STM-1 HSB 2m. Check the receiving level of re5007 and 522101 and find the value is -32 dBm. 2. This indicates that the software configuration is correct. The receiving level is normal during the commissioning. Check the XPIC cables of ODU and find that that the XPIC cables are all correctly connected. Alarms Microwave Products 19 . adjust the IF connection of 522101 to be the same as that of re5007. that is. in the two IDUs of a onehop device.zte.cn ZXMW SR10 XPIC Function Failure ⊙ Chen Haiping / ZTE Corporation Abstract: This article describes how to solve the problem of XPIC function failure for ZXMW SR10. No Connection of re5007 IF cables: The two IDM modules on the right are connected to a vertically-polarized ODU. Check and ensure that the receiving level meets the design requirement. which is comparatively complicated and easy to cause exceptions: The two IDU modules on the left are connected to a vertically-polarized ODU. Check the IF cable connection.www. Analysis and Troubleshooting 1. However. The two IDM modules on the left are connected to a horizontally-polarized ODU. Figure 2 shows the device connection. Device Connection 20 Maintenance Experience . check the XPIC cable connection first. Then. ■ Figure 2. check whether the IF cables with the same slot number are connected in the same way.September 2011 Issue 265 alarm is raised. Summary If the XPIC function cannot be implemented. check the hardware. only hardware model is related to ODU frequency. which is 7285500¬7355500 kHz. but the IF cable is connected to an ODU in another direction. check that the software configuration and hardware connection related to this parameter are completed. Therefore. 2. the parameter becomes configurable. Site KACUNG has two directions. In this instance. After the direction is corrected. first make sure that the parameters are correct.00. During the configuration of KACUNG parameters. such as cable connection and ODU model.com.www. It is in H sub-band and beyond the detected ODU frequency range. It is found that the shipment DO is correct and the configuration in this direction is ODU of H sub-band indeed. Check the shipment records and no mistake is found. Summary NR8250 parameter configuration is simple.zte. Then. it is doubted that the direction is incorrect. Configure the parameters for the direction from KACUNG to KELAPA: 1.cn NR8250 Multi-Directional Parameter Configuration ⊙ He Fengchao / ZTE Corporation Version: ZXMW NR8250 (1.000j) Keywords: Multi-directional parameter configuration Symptoms The configuration of ZXMW NR8250 multidirectional parameters requires the configuration of link KACUNG-KELAPA as shown in Figure 1. and find that the frequency of KACUNG in this direction is 7317000 kHz. If exceptions occur. This value is within the ODU frequency range displayed on the interface. Check the parameters from KACUNG to the other site SIMPANG_IBUL. the problem is caused by ODU type. Check the shipment DO. Analysis and Troubleshooting The hardware installation is completed. Check the parameter configuration table and find that the frequency of KACUNG in the direction to KELAPA is 7408000 kHz. Ask the local engineers and confirm that the configured frequency is correct. As the site KACUNG has two directions. Therefore. in G sub-band. it is found that the frequency cannot be entered. ■ Figure 1. Networking Diagram Microwave Products 21 . The result shows that the connection and antenna azimuth are correct. and solve the detected problem. Notify the local employees to ask the distributor to check the cable connection. D e t e r m i n e t h e O D U f r e q u e n c y r a n g e displayed on the radio link interface. for example. In addition. This avoids site down due to misoperation. The new version of S340 supports frequency modification at both ends.September 2011 Issue 265 ZXMW SR10 S340 Allows Frequency Modification at Both Local and Remote Ends ⊙ Pu Suqin / ZTE Corporation Abstract: Frequency modification at the local and remote ends of a link is quite common during actual commissioning and maintenance. For S340 provides a new function to prevent such a problem.2. the engineer has to go to the remote site to modify the frequency.22) Keywords: Frequency modification at both ends Symptom An on-site engineer modifies the frequency at the local site. engineers have to go to the both sites to solve problems. If this option is selected. ■ Analysis and Troubleshooting Misoperation by on-site engineers cannot be completely avoided during implementation of a large project. the frequency at the remote end is also modified at the same the time when the frequency of this hop is modified. Summary This function is practical but always lacks of attention from on-site engineers. but forgets the original frequency. As shown in Figure 1. box in the new version. A better application of this function can reduce operation risks and costs. when determining the existence of frequency interference and preventing frequency interference. the link is down and cannot be restored within a short period. a new option “Set also remote unit” is added to the frequency configuration dialog Figure 1. Frequency Setting Dialog Box in New S340 Version 22 Maintenance Experience . Any misoperation.6. As a result. may cause the link down. Version: ZXMW SR10 S340 V2.0.0.00 (6. To solve the problem. avoiding the risk of manual operation mistakes.