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tch_abis_fail_call

Viewing 4 posts - 1 through 4 (of 4 total)
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  • #68258 Reply
    Jose
    Guest

    Hi Gents ,

    I’m facing High tch_abis_fail_call in my Network

    Could anyone please let me know what are the main causes for these ? and how can be solved ?

    Is it RF Related ?

    Regards

    #68259 Reply
    Bijoy
    Guest

    Hello Jose.
    Causes for tch_abis_fail are:
    1.Missing acknowledgement of channel activation.
    2.Missing indication of call establishment.
    3.Receipt of an error indication, corrupted messages, missing measurement results from the BTS.
    4.When the timer T3109 expires in a BSC in call release phase while waiting for the Release Indication.

    What needs to check.
    1.Co-BSIC-BCCH cells.
    2.LAPD Overload of cells.
    3.Signalling Load of the BSC.
    4.BER in TX path(ZDMX).

    Br\\
    Bijoy

    #68260 Reply
    Jose
    Guest

    Many Thanks Bijoy for this ,

    Its helpful but i want to mention that my network is NSN

    Is there any specific points to do ?

    Regards

    #68261 Reply
    Bijoy
    Guest

    Hi Jose
    This counter is NSN specific only.
    In general,this counter is usually subtracted from the total attempts in the denominator as mostly it peggs due to T3109 expiry(pls check your TCH Drop formulae).If its very high for a cell or BSC,you need to check step by step all the mentioned points.

    Br\\
    Bijoy

Viewing 4 posts - 1 through 4 (of 4 total)
Reply To: tch_abis_fail_call
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