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Bss troubleshooting guide BSC RNC BSS TROUBLESHOOTING GUIDE TRANSMISSION BTS OSS connectivity down - both x down One X down NSEI Down BVCI Down Zero Voice calls on particular Cell Unit re-start SIGNALLING LINK OVERLOAD SIGNALLING LINK DOWN SIGNALLING LINK

BSC RNC BSS TROUBLESHOOTING GUIDE TRANSMISSION BTS OSS connectivity down - both x down One X down NSEI Down BVCI Down Zero Voice calls on particular Cell Unit re-start SIGNALLING LINK OVERLOAD SIGNALLING LINK DOWN SIGNALLING LINK ACTIVATION OR RESTORATION FAILURE SIGNALLING LINK SET DOWN GPRS EDGE LOAD IS VERY HIGH IN PCU OF PSE BTS AND TC UNSYNCHRONIZATION CLEAR CALLS ON ABIS INTERFACE WDU FAULTY STMU FAULTY MCMU RESTART BCSU RESTART BCSU SWITCHOVER Iu-CS link down Both Iu-PS links down One Iu-PS link down BASE STATION FAULTY BASE STATION OPERATION DEGRADED BASE STATION NOTIFICATION CELL FAULTY CELL OPERATION DEGRADED CELL NOTIFICATION BASE STATION LICENCE NOTIFICATION BASE STATION TRANSMISSION ALARM BEATING WCDMA BTS ALARM FAILURE IN WCDMA WBTS O M CONNECTION RNW O M SCENARIO FAILURE WCDMA CELL OUT OF USE HSDPA CONFIGURATION FAILED WCDMA BTS DEDICATED MEASUREMENT FAILURE HSUPA FAILURE IN WCEL WCDMA BASE STATION OUT OF USE BSS TROUBLESHOOTING GUIDE BFD Down in AXC Tellabs G Sites down G or G sites down Mw ring collapsed G G multiple sites down SYNCHRONISATION IS MISSING Some Subscribers not able to latch on TATA network from specific handsets Rx levels differ too much between main and diversity antennas RSSI detected Rx signal difference exceeding EXxx TRX module cooling fan s report no rotation ESMA System module cooling fan s report no rotation ERxx DDU module has detected VSWR above minor limit at anten S No Problem Alarm No at BSC Alarm Description Comments Catergory OSI CLNS LINKAGE NOT AVAILABLE OSI CLNS LINKAGE NOT AVAILABLE ALL NETWORK SERVICE ENTITIES UNAVAILABLE Service affecting non-Service affecting Non- Service affecting Service affecting Service affecting OSS connectivity down - both x down One X down BVCI Down NSEI Down DISK FAILURE DISK FAILURE Zero Voice calls on particular Cell BTS WITH NO TRANSACTIONS GPRS EDGE LOAD IS VERY HIGH IN PCU OF PSE Service affecting SIGNALLING LINK SET DOWN SIGNALLING LINK DOWN SIGNALLING LINK ACTIVATION OR RESTORATION FAILURE SIGNALLING LINK OVERLOAD SIGNALLING LINK OUT OF SERVICE FAILURE IN SIGNALLING LINK ACTIVATION OR RESTORATION SIGNALLING LINK LOAD OVER THRESHOLD BVCI Down Service affecting BTS AND TC UNSYNCHRONIZ ATION CLEAR CALLS ON ABIS INTERFACE BTS AND TC UNSYNCHRONIZATION CLEAR CALLS ON ABIS INTERFACE LINK SET UNAVAILABLE GPRS EDGE LOAD IS VERY HIGH IN PCU OF PSE Service affecting Non- Service affecting STMU FAULTY HW BLOCK FAILURE IN PLUG-IN UNIT Service Threatening MCMU RESTART INCORRECT WORKING STATE working State Changed Unit restarted Service Threatening WDU FAULTY NO ACCESS TO DISK INCORRECT WORKING STATE non-Service affecting BCSU RESTART INCORRECT WORKING STATE working State Changed Unit restarted Service affecting BCSU SWITCHOVER INCORRECT WORKING STATE working State Changed Unit Restarted Service Threatening Loss of Synchronization in BSC Failure in Synchronization Signal Service Threatening Affect Steps to be follow for troubleshoot Check the signalling links states at MSS end If signalling links link set down means BSC down Alarm-Link Set Unavailable Send local engineer at BSC site Check BSC end Mux status alarm st Mux unmanaged - check alarm at connected Mux