52571941-basic-command-for-2g-bts.pdf

7/27/2019 52571941-Basic-command-for-2G-BTS.pdf

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Basic command for 2G BTS

1. For UP/DOWN Status-

RLCRP: CELL=ALL ;( if shows 0 for all value site/sector will be down)

2. If site down check the condition of PCM if it is ABL (not working) verify theloop test to identify the fault and if PCM is working check the alarm on BTS.

3. For finding the PCM use command-

RXTCP: MOTY=RXOTG, CELL=cell; (cell id with sector i.e

BST001A)

It gives TG VAULE

RXAPP: MO=RXOTG-tg $; (tg$ is TG VALUE)

It gives device no. use last device

RADEP: DEV=dev$; (dev$ is device value i.e

RBLT-2719)

It gives SNT value

NTCOP: SNT=snt$;

Find the device no that is used in dev$ and corresponding vaule of DIP

4. Check the status of PCM

DTSTP: DIP=dip$; (dip$ is DIP VALUE i.e 83RBLT)

DTQDP: DIP=dip$; & DTQUP: DIP=dip$; (FOR finding error on PCM,

Check the value of es, ses uas & SLIP ,these value must be 0 or constant)

5. If PCM condition found working then BLOCK /DEBLOCK to get managed object

in working condition use command

RXBLI:MO=mo$,subord,force;

RXESE:MO=mo$,subord;

RXESI:MO=mo$,subord;

RXBLE:MO=mo$,subord;

(mo$ - RXOTG-tg$, RXOCF-tg$, RXOCON -tg$ ,RXOIS-tg$,RXOTRX-tg$-tei

value ,RXOTX-tg$- tei value,RXORX-tg$- tei value,RXOTS-tg$-tei value-time

slot no)

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6. For finding the faulty managed object use command

RXASP: MO=RXOTG- tg$;

This alarm list contains various alarms like BTS INT UNAFFECTED, BTS INT

AFFECTED, PERMANENT FAULT, some alarms can be removed by using

BLOCK/DEBLOCK commands.

7. For finding fault code on particular managed object (mo) use

RXMFP: MO=mo$;

This command shows fault code class and code some description is bellow

IF mo$ is RXOCF then FAULT CODE IS

2A-33 RX diversity lost2A-8 VSWR limits exceeded

2A-57 RX PATH IMBLANCE (VSWR)2A-39 RX cable disconnected (Related faults: RXORX 1B:9 - RX cable

disconnected)2A:7 RXDA amplifier current faults (CDU FAULTY Need replacement)

2A-21 internal power capacity reduced (PSU unit faulty or power off)2A-41 lost communication to TRU2A:23 Climate capacities reduced (Check fans and the Fan Control Unit)2A:9 Power limits exceeded (Related faults: RXOTX 1B:2 TRU faulty need

replacement)

If mo$ is RXOTRX then fault code is

1A-13 TX saturation (TRU FAULTY Need replacement)2A-12 TX output power limits exceeded (Related faults: TX 1B:13)

block/deblock unit if not work Change TRU2A-13 TX saturation (Related faults: TX 1B:14 - TX saturation)

block/deblock unit if not work Change TRU2A:25 TX max power restricted block /deblock unit if not work Change TRU2A:43 internal configuration fail block /deblock unit if not work Change TRU2A:42 Hardware IDB inconsistent check combiner chip & then IDB

Any alarm found other than mentioned above on any manage object then pleaseconsult with MSC Gorakhpur

8. FOR replacement of TRUFirst get local mode on TRU by pressing Local /Remote button on TRU2nd power off the TRU3RD with the help of T10 Screw driver open the 2 pair screw on upper/lowerend of unit4th replace the faulty unit with new one5th power on and wait until Local Lamp get constant glow6th again get remote status by pressing Local /Remote button on TRU

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Wait for operation condition by 5minute if not operational block/deblock fromBSC if not work contact with MSC Gorakhpur

Same processors adopt for CDU replacement (except Local/remote)Caution must be taken for wiring of units

Tools (basic) used for hardware replacement are-

32 wrench8/9 wrenchNoze pliers

T10T8

For analysis of TCH BLOCKING1. Find that site working in full configuration by using command

RXCDP: MO=RXOTG-tg$; (ALL mo must be configured)If any BLOCKED found then use commandRXASP: MO=RXOTG-tg$; (to find the all alarm and reason of block)IF LOCAL MODE found than try to make REMOTE otherwiseCheck the fault code by command

RXMFP:MO=mo$; (to find the exact fault code to make decision thathardware if faulty or not if hardware is faulty and need replacement thenbook the fault to ericsson and if the hardware is not faulty the

BLOCK/DEBLOCK to make unit operational )If any mo not block then check the half rate is on or offFor checking half rate use commandRLDHP: CELL=cell; (DHA=ON)If DHA not ON use command to on itRLDHC: CELL=cell, DHA=ON;If traffic is more than for witch site is configured (as erlang B table ) then

increase the value of half rate by using commandRLDHC: CELL=cell, DTHAMR=100, DTHNAMR=100;

Erlang B tableTRU (Per sector) Traffic that supported on full rate

1 2.2E2 8.0E3 14.5E4 21.4E5 28.5E6 35.8E7 43.1E8 50.5E

If none of the above case so new BTS is required to release congestion

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For analysis of TCH DROP/CALL DROP1. find alarm of RXOCF i.e VSWR or RX diversity lost if present the get rectify it2. find alarm of TRU if any alarm the get rectified3. use command RLCRP:CELL=cell; and in output see the ICM band must be 1

to 3 ifICM band is 4-5 then correspond TRU is faulty get replacement (for finding thecorresponding TRU use BPC no. in RLCRP: CELL=cell; and RXCDP: MO=RXOTG-tg$)

4. check handover report form Network quality report that is handover isproperly work

5. define handover if not present in neighbor list using the commandRLNRP: CELL=cell, CELLR=all; ( for neighbor list)RLNRI: CELL=cell, CELLR=cellr; (for cellr add in neighbor list)

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52571941-basic-command-for-2g-bts.pdf

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