NPTQ Rec 13.0.0 TroubleShooting BSS Hardware - TRX_BBSIG-BS60
BSS Troubleshooting Guide (2)
Transcript of BSS Troubleshooting Guide (2)
BSS TROUBLESHOOTING GUIDE
1 BSC
2 RNC
3 TRANSMISSION
4 BTS
BSS TROUBLESHOOTING GUIDE
OSS connectivity down - both x.25 downOne X.25 downNSEI DownBVCI DownZero Voice calls on particular CellUnit re-startSIGNALLING LINK OVERLOADSIGNALLING LINK DOWNSIGNALLING LINK ACTIVATION OR RESTORATION FAILURESIGNALLING LINK SET DOWNGPRS/EDGE LOAD IS VERY HIGH IN PCU OF PSEBTS AND TC UNSYNCHRONIZATION CLEAR CALLS ON ABIS INTERFACEWDU FAULTYSTMU FAULTYMCMU RESTARTBCSU RESTARTBCSU SWITCHOVER
Iu-CS link downBoth Iu-PS links downOne Iu-PS link downBASE STATION FAULTYBASE STATION OPERATION DEGRADEDBASE STATION NOTIFICATIONCELL FAULTYCELL OPERATION DEGRADEDCELL NOTIFICATIONBASE STATION LICENCE NOTIFICATIONBASE STATION TRANSMISSION ALARMBEATING WCDMA BTS ALARMFAILURE IN WCDMA WBTS O&M CONNECTIONRNW O&M SCENARIO FAILUREWCDMA CELL OUT OF USEHSDPA CONFIGURATION FAILEDWCDMA BTS DEDICATED MEASUREMENT FAILUREHSUPA FAILURE IN WCELWCDMA BASE STATION OUT OF USE
BFD Down in AXC (Tellabs)3G Sites down 2G or 3G sites down (Mw ring collapsed)2G/3G multiple sites down
Some Subscribers not able to latch on TATA network from specific handsets
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
SYNCHRONISATION IS MISSING All External Q1 device fail to respond
Rx levels differ too much between main and diversity antennas, RSSI detected Rx signal difference exceeding threshold
S. No. Problem Alarm Description / Comments Catergory
1 2175
Serv
ice
affec
ting
non-
Serv
ice
affec
ting
2 One X.25 down 2175
3 NSEI Down 3315
Serv
ice
affec
ting
4 BVCI Down
Serv
ice
affec
ting
Alarm No. at BSC
OSS connectivity down - both x.25
downOSI CLNS LINKAGE NOT
AVAILABLE
OSI CLNS LINKAGE NOT AVAILABLE
Non-Service
affecting
ALL NETWORK SERVICE ENTITIES UNAVAILABLE
4 BVCI Down
Serv
ice
affec
ting
5 7738
7 26
8 1072
9 2072
10 2070 LINK SET UNAVAILABLE
11 3415
12 2993
Serv
ice
affec
ting
Zero Voice calls on particular Cell
BTS WITH NO TRANSACTIONS
SIGNALLING LINK OVERLOAD
SIGNALLING LINK LOAD OVER THRESHOLD
SIGNALLING LINK DOWN
SIGNALLING LINK OUT OF SERVICE
SIGNALLING LINK
ACTIVATION OR RESTORATION
FAILURE
FAILURE IN SIGNALLING LINK ACTIVATION OR
RESTORATION
SIGNALLING LINK SET DOWN
Service affecting
GPRS/EDGE LOAD IS VERY
HIGH IN PCU OF PSE
GPRS/EDGE LOAD IS VERY HIGH IN PCU OF
PSE
Non-Service
affecting
BTS AND TC UNSYNCHRONIZ
ATION CLEAR CALLS ON ABIS
INTERFACE
BTS AND TC UNSYNCHRONIZATION CLEAR CALLS ON ABIS
INTERFACE
13 DISK FAILURE 2860 DISK FAILURE
14 WDU FAULTY 2861, 2692
non-
Serv
ice
affec
ting
15 STMU FAULTY 2794Se
rvic
e Th
reat
enin
g
NO ACCESS TO DISK ,INCORRECT WORKING STATE
HW BLOCK FAILURE IN PLUG-IN UNIT
16 MCMU RESTART
Serv
ice
Thre
aten
ing
17 BCSU RESTART
Serv
ice
affec
ting
26920690,1001
INCORRECT WORKING STATEworking State Changed , Unit restarted
269206901001
INCORRECT WORKING STATEworking State Changed , Unit restarted
18
Serv
ice
Thre
aten
ing
19 2,641
Serv
ice
Thre
aten
ing
BCSU SWITCHOVER
269206901001
INCORRECT WORKING STATEworking State ChangedUnit Restarted
Loss of Synchronization in BSC
Failure in Synchronization Signal
Affect / Steps to be follow for troubleshoot
1. Check the signalling links states at MSS end
3. Send local engineer at BSC site
1. Check the signalling links states at MSS end
5. If media ok, Send local engineer at BSC site
Data traffic affect, down
1. Check the PCU - BCSU combination
2. Ping SGSN (PAPU) IP from that BCSU-PCU
3. Trace PCU IP from SGSN
4. Shift the traffic (DAP) to other PCU-BCSU
Data traffic affect, down
2. If signalling links / link set down means BSC down(Alarm-Link Set Unavailable)
4. Check BSC end Mux status & alarm. 1st: Mux unmanaged - check alarm at connected Mux, Power issue at BSC site. 2. Mux managed - check alarm at Mux & verify the power status for BSC.
5. Login BSC via VDU / LANU. Check the alarms & current computer unit status, if login is possible.In case login is not possible ,get login through OMU CPU and check the status of OMU and other computer units.If we will not get the login through OMU also ,raise the emergency and follow steps as per with care team recommandation.
2. If Signalling links found ok, Check the voice & data traffic at MSS & PACO end (normal or any degradation)3. Check the Transmission path - Is there any alarm in X.25 E1 path / path broken, then re-route path & check X.25 links status.
6. Locally login the BSC via VDU / LANU & check the alarms. Reset the X.25 ET as well as X.25 links.
7. If BSC not login via VDU / LANU than login through CPU of OMU unit and check the status: after login ask for password then login ok, or if continuously restarting phase means OMU unit faulty. Do as per care team recommendations.
1. Check the Transmission path - Is there any alarm in X.25 E1 path / path broken.2. Check the alarms. If PCM ok then reset the X.25 ET as well as X.25 links from BSC .
Check no. of NESI's down, if down all - Trace PCU IP from SGSN & find last hop address & check media B/W that hop to BSC
If only some NSEI down (one or two) follow below steps
5. During MW Hrs diagnose that BCSU. 1. Diagnose ok - make BCSU in WO state and observe the alarm & UP/DL tbf. 2 Diagnose not ok - change the PCU and again run diagnosis.
1. GENA toggle & check status.
2. Check PCU-BCSU combination:
(c) BCSU switchover.
(d) PAPU re-set / switchover .Check hardware, cabling & commissioning
Check UP/DL quality, path imbalance/VSWR/RSSI
Check the Transmission path
Check the Transmission path
Impact: Call drop, Quality degradation, Call muting
(a) In case a particular PCU-BCSU combination: shift the traffic to other PCU & Switchover BCSU in MW and run diagnosis. (b) PCU-BCSU combination random on many BCSU-PCU combinations - Traffic prevent - unprevent from both end and PSE re-set.
This notice appears repeatedly - consider adding more signalling links
A signalling link has failed and changed state from IN SERVICE to OUT OF SERVICE, or its initial alignment attempt has failed.
If there are other path available, signalling links path re-route with discussion with planning team
The activation or restoration of a signalling link fails. Signalling transmission capacity decreased.
If there are other path available, signalling links path re-route with discussion with planning teamAll signalling links in the signalling link set are unavailable. 100% traffic of that link set down.Check alarm: 2064 - ROUTE SET UNAVAILABLE. If this alarm present means no route is availableCheck for the end to end connectivity for the Aters carrying signalling (MSC,TXN and BSC), transmission alarms.If found OK then send the engineers at the BSC for further troubleshooting.Check GPRS/EDGE load & balance the load by reallocate the DAPs
Thershold value need to be change or PCU addition require if load balancing ok.
Check the Transmission Media, if not ok then clear the path issue.If Transmission Media found OK, then check the timeslot mapping between bts and bsc should be checked. if mapping is fine, timeslot bypassing should be checked for the problem BTS/TRX, and if it is coming on more than one timeslot, and everything else is fine, trx should be replaced and call test should be done on all time slots after replacement. If it is coming for only one timeslot, the time slot may be locked till the time , replacement is made. the site should also be checked for other alarms and reqd action should be taken .
The system has detected a serious error that may have been caused by the hard disk or the SCSI controller plug-in unit breaking down.Saving data into the hard disk or reading data from the hard disk fails.Run the diagnosis on the faulty hard disk and if diagnosis fail then change the hard disk as per standard procedure for replacing the WDUImpact: No hard disk Redundancy, Measurements might be affected.
) and DCAR card .perform the OMU restart and check .if problem reolved, perform the diagonisis of WDU and check the all database is updated or not .3. if problem does not resolved , swap the position of WDUs in DCAR card and check if problem shifted to another hard dsik it means it is hard disk issue ,if problem is with same slot it means it is a problem of DCAR card. (During this troubleshooting SOMAFI
1. Check the status of STMU with ZUSI:STMU:; commands. Check the current & History alarms & Site/aters outage if any related to faulty STMU.2. Check the supplementary information of alarms & work as per information .3. Clear the faulty tag with ZUST command and observe.4. Check the alarms of ET/ transmission and set loss with ZYWI command.5. Temperature condition need to check at BSC location.6. Check the STMU cabling and if required replace the Hardware.
1. Check the status of computer units with ZUSI:COMP:; commands. Check the current & History alarms. 2. Check the supplementary information of alarms & work as per information (switchover / diagnose).3. check ZIGO & ZUDH.4. Change the state of MCMU to SE-NH and perform the JOJI of all cards og MCMU and GSW .after Diagonise the unit and check.4. if problem repeates on same MCMU ,replace the hardware with help of alarm info. 5. Perform the diagonistics of that MCMU /EMB and make it in working State.6. If no alarm found or problem occur on different -different units with same alarm Number it may be a SW bug.Note : Kindly note before switchoff the MCMU respective MCMU and EMB should be in SE-NH state also during any hardware replacement check the Jumper setting of the card.during any hardware replacement check the Jumper setting of the card.
1. Check the status of computer units with ZUSI:COMP:; commands. Check the current & History alarms. 2. Check the supplementary information of alarms & work as per information (switchover / diagnose).3. check ZIGO & ZUDH.4. if problem repeates on same BCSU ,replace the hardware with help of alarm info. 5. Perform the diagonistics of the BCSU with both MCMU and make it in working State.6. Check the BVCI state and lapd States7. If no alarm found or problem occur on different -different units with same alarm Number it may be a SW bug.Note : During any hardware replacement check the Jumper setting of the card accordingly.
1. Check the status of computer units with ZUSI:COMP:; commands. Check the current & History alarms. 2. Check the supplementary information of alarm & work as per information (switchover / diagnose).3. check ZIGO & ZUDH.4. if problem repeates on same BCSU ,replace the hardware with help of alarm info. 5. Perform the diagonistics of the BCSU with both MCMU and make it in working State.6. Check the BVCI and Lapd state.7. If no alarm found or problem occur on different -different units with same alarm Number it may be a SW bug.Note : During any hardware replacement check the Jumper setting of the card accordingly.
1. Check the ZDRI :; command output with Current alarms.2. Check the ET alarms on Sync ET .3. Disconnect the all sync with ZDRC command ,setthe ossilator control word value to 32000 on both CLS and reconnect the all sync inputs with correct priority.Note : If any BSC is out of Sync ,there will be slip on all ETs of that BSC .
S. No. Problem Cateagory Impact
1 Iu-CS link down 2070 SA RNC Total Outage
2 2070 SA RNC data traffic outage
3 2070 NSA No Data traffic outage
4
7650 SA Transmission to NodeB will be affected
5 7651
SD
SA NBAP/AAL2 signalling link failure
SA
Alarm No. at RNC
Alarm Description /
Comments
LINK SET UNAVAILABLE
Both Iu-PS links down
LINK SET UNAVAILABLE
One Iu-PS link down
LINK SET UNAVAILABLE
BASE STATION FAULTY
No connection to Flexi transport submodule
BASE STATION OPERATION DEGRADED
BTS reference clock missing
Service will be affected based on the degradtion threshold level
BTS RNC/I-HSPA interface signalling link failure
System module failure
NodeB Capacity may be reduced/NodeB totally may not be opreational
6 7652
SA
NSA BTS time will not be correct
NSA
Fan failure NSA Temparature will be increased
SA
SA
7 CELL FAULTY 7653 SA
VSWR alarm
8 7654
SA Sectors Operation will be degraded
BASE STATION NOTIFICATION
BTS requires restart because license status has changed
Mentioned licence feature will not work
BTS time not corrected
Difference between BTS master clock and reference frequency
BTS frequecy deviates from IuB referecne
Heating element not working
Heating from the heating element isnot available. The module temperaturemay not reach the working level ormay reach it very slowly
Temperature alarm
Depending on severity BTS Capacity may be reduced/BTS totally may not be opreational
Failure in optical RP3 interface
Depending on severity BTS Capacity may be reduced/BTS totally may not be opreational
Incompatible SW version detected
Depending on severity BTS Capacity may be reduced/BTS totally may not be opreational
RF module failure
Sectors will be affected depends on severity
Depending on severity BTS Capacity may be reduced/BTS totally may not be opreational
CELL OPERATION DEGRADED
RF module failure
8 7654NSA Sectors Operation will be degraded
97655 SA Cell will be down
10 7661
NSA
SA Sector down
SA SDPA Traffic will affect
CELL OPERATION DEGRADED Rx signal level
failure
CELL NOTIFICATION
Radio resources switched off
BASE STATION LICENCE
NOTIFICATION
HW capacity too low for feature 308, Licence Based BTS channel c
The licenses are granted but cannot be used. Some of the licensed features are not available.
Licence missing 00000001125, Flexi WCDMA BTS 60W Power License
Licence missing 0000000306, HSDPA 16QAM SW Licence Support
Licence missing 0000000307, HSDPA Proportional Fair Resource Pac
NSA Degradation
Licence missing 0000000649, Shared HSDPA Scheduler for Baseband
NSA Degradation
10 7661
SA
11 7665 SA
Service Degraded
Cell Down
127740 (blank) NSA Repeatation of any alarm causes
13
7750 (blank) NSA
14 7761 SA
Cell Down
Cell Down
Cell Down
Cell Down
15 7771 SA
Sector down
Sector down
BASE STATION LICENCE
NOTIFICATION
Verification of target ID failed 3 times.
Degradation of system module
BASE STATION TRANSMISSION
ALARM
License missing for feature Additional 2 E1, T1, JT1 interface o
License missing for feature UBR+.
BEATING WCDMA BTS ALARM
FAILURE IN WCDMA WBTS O&M CONNECTION
BTS Cannot be logined remotly & Measurements will not be updated
RNW O&M SCENARIO FAILURE
AAL2 path unblock not accomplished
BCCH information updating has failed
Common channel deletion has failed
NBAP interface type unknown failure
WCDMA CELL OUT OF USE
Block resource request, normal priority
Common measurement failure scenario
15 7771 SA Sector down
Sector down
Sector down
When Site Down Or Sector Down
16 7772 SD
Service Degraded
Service Degraded
17
7778 SA DCN state - Disable Or Cell Faulty
18 7780 SA
197786 (blank) SA WBTS will be down
WCDMA CELL OUT OF USE
NBAP link failure
Resource status indication, cell disabled
WCEL state not WO
WCEL state not WO after setup
HSDPA CONFIGURATION FAILED
RNC internal error
WBTS rejects the configuration
WCDMA BTS DEDICATED MEASUREMENT FAILURE
HSUPA FAILURE IN WCEL
A unit (or units),taking care of HSUPA traffic in the WCEL can be faulty
A unit (or units),taking care of HSUPA traffic in the WCEL can be faulty
A unit (or units),taking care of HSUPA traffic in the WCEL can be faulty
WCDMA BASE STATION OUT OF USE
Affect / Steps to be follow for troubleshoot
Possible Causes Solution
Site Clock E1 having errors / AIS
Transmission break or fluctuations
Abnormal functioning of FSM Reset FSM/Replace FSM
Affects: Communication with MSS down: Total outage1. Check the unit status for any failure and check the current and history alarms2. Ping & trace MSS control plane and user plane IP3. Check Association set and association links status and end IP4. Check connectivity B/W end trace IP to MSS.Affects: Communication with Both SGSN down: Total data Traffic outage1. Check the unit status for any failure and check the current and history alarms2. Ping & trace SGSN control plane and user plane IP3. Check Association set and association links status and end IP4. Check connectivity B/W end trace IP to MSS.Affects: Communication with one SGSN down: data working fine with connected SGSN, no outage happened in this case,only redundant path down.1. Check the unit status for any failure and check the current and history alarms2. Ping & trace SGSN control plane and user plane IP3. Check Association set and association links status and end IP4. Check connectivity B/W end trace IP to MSS.
Malfunction of Transport Module in System Module
Reset System Module/Replace Transport Module in System Module
Clock E1 Interface needs to be check & Check the SYNC of TXN side
Check transmission configurations and paths
Restart BTS.
NTP Server IP mismatch
DAC Valure variations Set DAC value to standard value
H/W Faulty
Check the FAN units in FSM/FRGP
SW Mismatch of BTS
Abnormal functioning of FRGP
High VSWR
Abnormal functioning of FRGP
After licence installation BTS not given restart
Check NTP server IP it should be same as RNC OMS IP
Check working status of Fans or replcae FAN units in FSM
The heater control connection of the FSM is faulty, there is no heater or the heater is faulty.
Check whether the heating element exists at all./ Check the heater control connection and that the heater is working./ Replace the alarming component.
The internal temperature of the RF Module or System Module exceeds the threshold value, or the ambient temperature of the module(s) is outside the specified limits.
Abnormal/ failure in optical cable between FSM & FRGP
Check the Optical cable connecton between FSM & FRGP/Reset FSM/Replace cable.
Recomission BTS with Correct SW version
Reset FRGP/FSM/Check interface cables/Replace FRGP
Check the VSWR, should be less than 1.3
Reset FRGP/FSM/Check interface cables/Replace FRGP
Check the VSWR & Antenna cables
HSDPA License Missing Or Cell Down Call to GNSC CM get it clear
The RX signal level is less than -112dBm or the difference between the maximum and minimum power levels of all RX antennas in the same cell and sector is more than the limit (4 dB).
As per configuration H/W mismatch/unavailability
Check the cell configration & H/W availbilty at site
The HW capacity is too low to support all licenses of an optional feature.
Call to GNSC CM Delete the licenses or insert new hardware.
During NodeB commissioning seleted 60W power for sector.
Login to nodeB and change parameters of sector power to 20W
License missing License missing
License missing License missing
This basic license missing
HSDPA License Missing
Repeatation of any alarm causes
Cell Down Need to check WCELL/WBTS alarm
Cell Down
Hanged/config issue/comm issue Hanged/config issue/comm issue
GNSC has to load this basic license from Netact
GNSC has to load this basic license from Netact
Cancels once causing Alarm is cleared
DCN Configuration mismimatch in NodeB/RNC/tellabs
To be checked DCN Configrations at RNC/NodeB/Tellabs
CoCo/ATM Configuration Mismatches between NodeB/RNC/Tellabs
To be checked CoCo/ATM Configuration Mismatches between NodeB/RNC/Tellabs
CoCo/ATM Configuration Mismatches between NodeB/RNC/Tellabs
To be checked CoCo/ATM Configuration Mismatches between NodeB/RNC/Tellabs
CoCo/ATM Configuration Mismatches between NodeB/RNC/Tellabs
To be checked CoCo/ATM Configuration Mismatches between NodeB/RNC/Tellabs
CoCo/ATM Configuration Mismatches between NodeB/RNC/Tellabs
To be checked CoCo/ATM Configuration Mismatches between NodeB/RNC/Tellabs
Need to check WCELL/WBTS alarm
Cell Down
Cell Down
Cell Down
Cell Down
Cell Down
Cell Down
Cell Down
CNBAP/BRM Break
Need to check WCELL/WBTS alarm
Need to check WCELL/WBTS alarm
Need to check WCELL/WBTS alarm
Once Node-b is up, alarm will clear
Cell Down / Interface Down Or H/W configuration In Node-B
Node-B Lock & Unlock Or Restart Node-B / Cross check & Rectify Node-B H/W Configuration --All This action based on Sublimentory information of Alarm
Cell Down / Interface Down Or H/W configuration In Node-B
Node-B Lock & Unlock Or Restart Node-B / Cross check Node-B H/W Configuration --All This action based on supplementary Alarm Info.
DCN connected E1 Interface needs to be cross check
DCN Interface / Lock all the cells under the BCF and delete & Re-create COCO configuration and unlock all the cells / If required Site reset has to be given ( Anlaysis based on supplementary info)
A unit (or units),taking care of HSUPA traffic in the WCEL can be faulty
A unit (or units),taking care of HSUPA traffic in the WCEL can be faulty
A unit (or units),taking care of HSUPA traffic in the WCEL can be faulty
Check the transmission path & Configuration between NodeB to RNC
S. No. Problem Alarm No. at BSC Alarm Description / Comments Catergory
1 7665 BFD down
2 3G Sites down Base Station out use
3 Fault rate monitoring & PCM failures
4 Fault rate monitoring & PCM failures
5 M/W Link Problem
Serv
ice
Thre
atni
ng
BFD Down in AXC (Tellabs)
Service Degradation
Service affecting
2G or 3G sites down (Mw ring collapsed)
Service affecting
2G/3G multiple sites down
Service affecting
No Alarm observed in the link, except RSL dip at one end.
At one end, RSL of the link is OK, on other end it dips to -90dBm.
No typical alarm observed in the link.
Affect / Steps to be follow for troubleshoot
Deimplement trails for culprits ISA & raplace ISA ASAP.
Sites need to be indentified on particular MUX
Core mux malfunctioning at BSC/RNC location
2G & 3G site database shared with all CTLs
BFD down or fluctutating in AXC & data traffic shifted to ATM, Cause HSPA fallback enabled. Checked txn media as well as ISA card or reset Mux ISA card to restore BFD.
Need to check utilization of GE ports, If broadcast packets incresing then need to check the txn- media & ISA card.
Downs sites need to be check belongs particular AXC card or Mux particular STM-1 port. Need to check alarms on port, If any alarm appears then switch to redundant port to restore sites
If the CPU utilization for both Main & Spare IFMcard are hign then remove one by one & inserted Main card to reduce CPU utilization. Atlast switched CDC card from main to redundant card.
Need to check alrams on ALU mux port during ring collapsed at both end.
Need to ping connecting IDU from GNOC to check alarms & w.r.t appeared alarms we identify either power issue or hardware fault
Enginners need to send at site with hardware for further trouble shooting.
Impact: Microwave Link gets down
Reason of the problem: Normally in this type of scenario, ODU of the link (at the end where RSL is OK) is misbehaving. Its transmitor gets off, stops radiating. But, it receives the signal properly.
Troubleshooting: ODU to be replaced
S. No. Problem BTS Type
1 Flexi/MR 7787
2
3 Flexi 7607
4 Flexi 7607
5 Flexi/MR 7607
Alarm No. at BSC
SYNCHRONISATION IS MISSING All External Q1 device fail to respond
a)Some Subscribers were not able to latch on TATA network from specific handsets.While Same Handsets were running fine with IDEA or any other operator from a perticular site (N_UW_NRA_001,Muzzafarnagar)
Flexi Edge BTS
Rx levels differ too much between main and diversity antennas, RSSI detected Rx signal difference exceeding threshold
EXxx TRX module cooling fan s report no rotation,ESMA System module cooling fan s report no rotation
a)ERxx DDU module has detected VSWR above minor limit at anten
Alarm Description / Comments Catergory
Service affecting
Service affecting
service affecting
DFCA not working in that particular Site,One more Observation:Site will continously restart when DFCA is enabled in the site
Observation:At Problematic location/Premises(N_UW_NRA_001,Muzzafarnagar) there are two NSN equipments serving for IDEA/TATA.No alarm was found on problematic site.
Rx levels differ too much between main and diversity antennas,RSSI Value is high than 10.
Service Degrading
TRX cooling fan not rotate ESMA cooling Fan not rotate
Service Degrading
VSWR limit is high than 1.5 for Minor alarm and >2.7 for major alarm
Affect / Steps to be follow for troubleshoot
BCF Alarm Guide
1.First step to check the site is down or not (ZEOL) 2.if site is working with DFCA unsync and LMU is in stand by mode (ZEFL) than visit the site 3.Check the parameters such as LMU area parameter,DFCA disabled or enabled4.Check ESLA cable connectivity between ESMA to LMU ,if found any abnormality then Replace ESLA cable 5.Check LMU unit Activities steps as follow:-1.Firstly we Check Infra condition of the site2.Check the BTS configuration of the site ,properly check weather there is any alarm in site,But no service affecting/Service degrading alarm found3.After that we check DAC value,RSSI comparision value and VSWR value with Site master but problem not resolved.4.Change the PLMN allowed from 1 upto 7.5.Replaced the ESMA card. 6.Shift BCCH to another TRX and check7.Shift BCCH to another TRX and check.8.Swapping of TRX's from other perfet site to problamatic site and check. 9.Site deletion and further recreation done still no improvement found10.Rehome the site BCF-22/ Muzaffarnagar BSC to Meerut -1 BSC with different LAC and CI and check.11.Finally problem resolved after replacing the ESMA card of IDEA site serving at same location.Conclusion - There was some Sync problem at Idea Site of that perticular loaction 1.Check the RSSI measurements with BTS Manager.2.Check the BTS RF cables and connections.Check the antenna and RX cabling. 3.If the antenna and RX cabling are faulty, correct the problem and run TRX test to cancel the alarm.4.Check and measure VSWR of the antenna lines.5.Check that the RX-DL parameter at the BSC is set to a reasonable value in order to prevent unnecessary alarms.1.90% there is a chance of Over heating or Room tempurature high inside shelter 2.if there in an issue of tempurature resolve the issue along with IP 3.Check that the fan unit cable is correctly connect to DTRX/ESMA 4.Check that there are no obstacles preventing the fan(s) from rotating 5.Clean the fan unit of dust and/or dirt 6.if problem is still presist then Replace the fan unit 7.If problem is not resolved with all above steps then Replace TRX/ESMA
1.Measure VSWR value with Site Master ,If value is found high then second step is to see the fault via Distance to fault location . 2.According to distance found, replace connector,Jumper ,Anteena or damaged feeder cable 3.With external test equipment check VSWR of the antenna line. Repeat step 1 if the measurement is again high 4.Check RSSI comparision value between Main and diversity of that particular sector
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