Which SIP message header is used to tunnel QSIG messages across the SIP network when the OGW receives a call bound for the TGW?
Which SIP response message should the TGW send if it cannot process the tunneled QSIG messages from the OGW?
which SIP message is being used by the recipient to notify the originator that the final recipient was successfully contacted?
Which device is the initiator of a StationD message in a Cisco Unified Communications Manager SDI trace?