DTMF Transfer Processing Overview

Enabling 2 UAs to communicate different DTMF indications with each other is facilitated in two steps. First, the Oracle® Enterprise Session Border Controller takes an active role in the SDP negotiation between two UAs, this is the capability negotiation step. You can configure your system to suggest the DTMF indication methods that each endpoint can and can not use.

The second step is translation evaluation. After the SDP negotiation is complete, based on system configuration and the media support on each call leg, the Oracle® Enterprise Session Border Controller performs DTMF indication conversion or passive forwarding of DTMF indication messages between UAs.