I've a scheme Users<>Avaya CM5.2.1<>GSM GW1600
when I've upgraded FW on gsm GW from 2.3.1 to 2.3.2, all calls to gsm network are dropped.
if I've downgraded FW from 2.3.2 to 2.3.1 without any changes in config of GSM GW and Avaya trunk, calls are welldone via GSM GW
this is Avaya sip trace log of successfull call