Thanks to All,
to Vanderlay: Yes I mean blocked attempts, the other one is not used in SDCCH dimensionning because it gives you the utilization of the ressources.
to Fabio: I didn’t tried to add more LAPDm link on the Abis because the number of TRX’s in the BTSM not exceed 14, when this happend people in NOC add second Abis with another LAPDm link..do you have any idea about maximum number of TRX’s supported by one LAPDm TS for signaling in the Abis interface?
thanks in advance