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SILENCE problem

Viewing 7 posts - 1 through 7 (of 7 total)
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  • 11th January 2005 at 08:14 #40479
    sakuraba
    Guest

    Hi all!!
    We have problem with silence MMC calls (Siemens BSC and MSC). When subscriber make a call the other side is having ring, and then is a silence, after his answer. After that, on the next attempt call is usually successful.
    Is there way to find a solutions on some measurements for this?
    Or is there any idea to solve this problem….

    Please help.

    12th January 2005 at 05:38 #40480
    Mohsin Ismail
    Guest

    hi sakuraba

    Usually when it happen, it was related to A interface trunk (between TRAU and MSC). one of or may be more of your trunk is in not good quality. So when a call sieze that trunk it recieve that problem. Here i’m suggest that, you check the trunk quality, for example every MSC have one command to check the PCM quality or via the trunk traffic analysis, or make a test call per trunk basis..

    hope it can give as a guide for you.

    12th January 2005 at 07:00 #40481
    Mikhail
    Guest

    If the trunk is newly added, the possible reason can be inconsistent CIC between MSC-BSC. I already met such problems

    13th January 2005 at 07:46 #40482
    sakuraba
    Guest

    Thanks for your help!!

    But the problem is solved after restart some defective TRAU units.

    Best regards!

    15th April 2005 at 06:22 #40483
    ASAD MAHMOOD KHAN
    Guest

    Hi u all,
    If this types of problem persists long then we may guess for CIC mismatch so as it was clear that second attemt it was ok so definetly prob was not with CIC

    Rgds
    asad

    15th April 2005 at 13:47 #40484
    Dariush
    Guest

    Hi,dear sakuraba

    I faced with same problem and there were not any Cic mismatching then i found out this problem occour becuase of TRAC(obviously,the tracs sometime need test and restart becuase of software damage in it) in transcode after testing Trau(Trac)or restart on trau it was solved.

    Yours,
    Dariush

    26th April 2005 at 16:26 #40485
    Ashish Goel
    Guest

    Hi,

    u can also run a performance test on the trau and check whether it fails or not. Failure means there can a problem in the TRAU.

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Viewing 7 posts - 1 through 7 (of 7 total)
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