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Reply To: tch_abis_fail_call


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).