[Sip-implementors] How to send DTMF digits?

[Dan Firac]

Hello,   How should I send DTMF digits? Using RTP (RFC2833) or through the INFO header ?   If the answer is using RTP, where can I find solid documentation for atributes like 'fmtp', 'rtpmap' for defining dynamic payload types. It will be usefull for me if you have a SDP message dump for two audio media streams, one for G723 and other for DTMF, along with the dynamic payload type definitions for: the redundant type and the telephony-events type.   Thank you, Dan Firac, Software Engineer, +4093260623 Redline Communications