1/ the MS timer is internal, it cannot be set at BSS level.
2/ a channel request shall be answered with an Imm Assignment. The 2nd ch req. is actually answered with an imm assignment (sorry, i didn’t make that clear in my previous reply)
But this I.A. is not received by the MS (MS is already on a SDCCH).
It is therefore counted as a SDCCH assignment failure due to radio problems, in alcatel systems. In other systems, i don’t know if it is counted, and if it is, i don’t know how it is counted.