Hi Fabio,
Thanks a lot for your clarrification, you are right concerning the unavailable TS on the Abis interface because I asked for Alarm report on cells in the OMC and most of them having LAPD Signalling overload ( may be caused by link instable), I reduce Timer T3101 from HLFSEC-6 to HLFSEC-3 to minimise the effect of Fantom RACH and the blocking is minimised but still high in some cells even if the capacity is OK, so what should I do to solve problem of overload on the LAPD (ABIS)?
thanks in advance