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Dropped Call

Viewing 8 posts - 1 through 8 (of 8 total)
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  • 30th November 2009 at 17:11 #59837
    SAM
    Guest

    Can anyone explain what could be the reason for (Drop type: Abnormal network. And CC Cause: Temporary failure.) It is DL disconnect request. We are having Dropped Call in our network. From DT Signaling L3 message we can see the above cause.

    we don’t have any quality issue.

    Quality average:
    FER Actual (%)=3.04
    RxQual Sub=0.22
    SQI=12.67
    RxLev Sub (dBm)=-80.49

    Please help me to understand.

    Thanks

    30th November 2009 at 17:32 #59838
    Duke
    Guest

    I am working on SIEMENS equipments.Can anyone let me know how to close remote login/put password so that anyone from BTS/TRAU via LMT will not be able to login BSC.

    4th September 2010 at 18:52 #59839
    HH
    Guest

    Dear SAM,

    I have some problem also with yours, do you managed to solve it now? could you share the solution with me?

    7th September 2010 at 05:08 #59840
    Mania
    Guest

    @SAM: Whats with the stats are there Equipment failures / Transcoder drops on the cell.This failure usually comes when there is some EQ failure

    19th September 2010 at 14:43 #59841
    Herry
    Guest

    @Mania : So this kind of dropped problem confirmed from Eq/Transcoder part? HOw to check more details?

    Hi Bijoy/Pix,

    Need your help also for this, thanks before

    21st September 2010 at 07:08 #59842
    Mania
    Guest

    Hi,
    Well the Drops due to fluctuations on ABIS And Site due to link / power / faunty HW Issue. check the drop call reasons. in Siemens and Alcatel they are pegged seperately. else check alarms.
    Don’t know the exact counter tell me your vendor if you dont find it, i’ll try and look it up for you

    21st September 2010 at 08:55 #59843
    Bijoy
    Guest

    Hi Herry
    As per 3GPP 24.008,This cause indicates that the network is not functioning correctly and that the condition is no likely to last a long period of time; e.g., the user may wish to try another call attempt almost immediately.

    This means that there is a temporary failure at the physical layer of the network.So,you need to check all possible resons.You can start like this

    If few cells,check for HW alarms,Tx media etc

    If occurs randomly in almost every cell,check for TXCDR pool mismatch,Equipment failure,etc etc.

    Br\\
    Bijoy

    21st September 2010 at 10:23 #59844
    Herry
    Guest

    @Bijoy : Drop happens randomly and it’s not in the same locations.
    I’ll try to check TXCDR pool mismatch,Equipment failure as you suggested, but it’ll be helpful for me if you can explain me in details how to do it, thanks

    @Mania :we’re using Ericsson Equipment. For BTS HW/Alarms i already checked and i cant find any.
    Please let me know if you have ay further suggestions.

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