RFC 2833 DTMF Interworking

This section explains the Oracle® Enterprise Session Border Controller’s support of transporting Dual Tone Multi-Frequency (DTMF) in Real-Time Transport Protocol (RTP) packets (as described in RFC 2833) to H.245 User Input Indication (UII) or SIP INFO method interworking.

Multimedia devices and applications must exchange user-input DTMF information end-to-end over IP networks. The Oracle® Enterprise Session Border Controller provides the interworking capabilities required to interconnect networks that use different signaling protocols. Also, the Oracle® Enterprise Session Border Controller provides DTMF translation to communicate DTMF across network boundaries.

The Oracle® Enterprise Session Border Controller supports:

• RFC 2833 to H.245 UII translation for H.323-to-H.323 calls, when one side is a version 4 H.323 device requiring RFC-2833 DTMF event packets, and the other side is a pre-version 4 H.323 device that only uses H.245 UII.
• RFC 2833 to H.245 UII or INFO translation of H.323 to SIP (and SIP to H.323) IWF calls, when one side is a version 4 H.323 device requiring RFC 2833 DTMF event packets and the SIP endpoint only supports INFO messages. Or when one side is a pre-version 4 H.323 device that only uses H.245 UII and the SIP endpoint supports RFC-2833 DTMF event packets.