AudioCodes Mediant 600 User Manual page 575

SIP User's Manual
Mid-call communication: After the SIP connection is established, all QSIG messages
are encapsulated in SIP INFO messages.
Call tear-down: The SIP connection is terminated once the QSIG call is complete.
The RELEASE COMPLETE message is encapsulated in the SIP BYE message that
terminates the session.
To enable QSIG tunneling, set the parameter EnableQSIGTunneling to 1 on both the
originating and terminating devices, and the parameter ISDNDuplicateQ931BuffMode to
128 (duplicate all messages) (both parameters are described in ''ISDN and CAS
Interworking-Related Parameters'' on page 365).
Version 5.8 575
12. Tunneling Applications
September 2009