Hi;
I think G.729 Appendix E is suppouse to carrie in-band DTMF.
But there are other ways to do it using SIP signaling:
1- INFO Messages ( currently used in mid call events like double # )
2- SUBSCRIBE/NOTIFY
3- KPLM
[EMAIL PROTECTED] wrote:
Gaurav,
There are initiatives such as Key Pad Markup Language (KPML) as in
the draft RFC draft-burger-sipping-kpml which define a standard way of
communicating key pad events in SIP bodies.
- Wayne
Gaurav asked:
*****************************************
Hi,
Apart from RFC 2833, is there any other way of being able to send/
receive DTMF information using the G.729 codec ? As per RFC 2833,
Encoding it as RTP Payload with G.729 will destroy in-band signaling
information which is carried using the least-significant bit. Hence, it
is not advisable.
Is there any other mechanism to generate this information out of band ?
Any inputs on the mentioned issue are most welcome.
Thanks and Regards,
Gaurav
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