Currently I have interconnected a GW AS5300 with an Ericsson ANS using ISDN. The GW receives calls in SIP via Internet and pass them to the ANS using ISDN.
My question: does the GW reserves an ISDN channel even if the calls ends up being:
Cause i = 0x8295 - Call rejected
Cause i = 0x8283 - No route to destination
Cause i = 0x8A81 - Unallocated/unassigned number
Thanks in advance.