SIP Interface

To configure the RFC 2833 mode on a SIP interface:

1. In Superuser mode, type configure terminal and press Enter.

   ORACLE# configure terminal

2. Type session-router and press Enter.

   ORACLE(configure)# session-router

3. Type sip-interface and press Enter.

   ORACLE(session-router)# sip-interface

4. If you are adding support for this feature to a pre-existing SIP interface, then you must select the specific configuration instance, using the ACLI select command.
5. rfc2833-mode—Set this parameter to either transparent, preferred, or dual based upon the behavior your want for this SIP interface.

   • transparent—does not add RFC 2833 telephone-event into SDP if not present, and does not prefer.

   • preferred—adds RFC 2833 telephone-event media type into SDP and prefers to use this method for DTMF indication.

   • dual—adds RFC 2833 telephone-event media type into SDP and sends both SDP and signaling-based DTMF indications if possible.

6. rfc2833-payload—Set this parameter to the media-type value you wish to use when inserting RFC 2833 telephone-events into an SDP offer. 101 is the generally accepted media type for RFC 2833 telephone-events.
7. Save and activate your configuration.