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BTS AND TC

  • This topic has 7 replies, 1 voice, and was last updated 8 months ago by antonio.
Viewing 8 posts - 1 through 8 (of 8 total)
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  • #59522 Reply
    alex
    Guest

    hi all.
    i am new in gsm.
    i have an alarm on my bsc that clears calls on A interface or Abis interface.
    this alarm changes its state (between cancelling an enabling)almost
    every 1 second.
    my vendor is nokia.
    the following alarm:
    2992 BTS AND TC UNSYNCHRONIZATION CLEAR CALLS ON A(or Abis) INTERFACE.
    plese somone help me to fix this alarm.

    #59523 Reply
    Bijoy
    Guest

    Hi Alex.
    For 2992,check for cic mismatch between TC and A-interface.
    For 2993,check for configuration mismatch between OMC and BTS Manager

    #59524 Reply
    alex
    Guest

    hi bijoy
    thanx for your reply.
    by i sead that i am new in gsm.
    please explain for me with detail.
    actually you believe that this alarm fix with correct the Definitions between TC and A (or Abis)interface(software solution)?
    or i have to fix it with check my hardware(TRX,COMBINER,…)?
    meanwhile i had 7745 and 7743 alarm on my bts that have alarm 2993.
    plaese explain me with details.
    thanx

    #59525 Reply
    Bijoy
    Guest

    Hi Alex
    7745 & 7743 mostly comes along with 2993 because call failure rate will be too high for that TRX.
    In Ultrasite BTS Hub Manager,check for TRX bypassing configuration & Cross connection.Also check for incorrect E1 TS bypassing.2993 never comes for any type of H/W fault,it comes only due to configuration mismatch between Site(BTS HUB Manager) & OMC configuration.
    The supplementary info in 2993 alarm will tell you the culprit BTS, TRX & PCM on which it is configured

    #59526 Reply
    alex
    Guest

    thanx alot

    but what about 2992?

    #59527 Reply
    Bijoy
    Guest

    For 2992,check whether all circuits of CGR are created in MSC end also.One way to check is whether the CIC’s indicated in 2992 is created/faulty/blocked on the A-interface also.You can get the CIC & PCM info from the supplementary field

    #59528 Reply
    sachin
    Guest

    How we can overcome this 2992 alarm and can identify . Can we identify the CIC mismatch or configitaional issue !

    #71506 Reply
    antonio
    Guest

    I need to know what class alarm means:

    (39800) 7789 NO (E)GPRS TRANSACTIONS IN BTS

Viewing 8 posts - 1 through 8 (of 8 total)
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