> > Ravi I think we are talking about 2 different things. If you are sending RFC2833, then the remote end should reproduce the sound. However, if you are between 2 UAC devices (i,e, 2 soft phones), then what will the sound represent and how will you know the difference? I don't know about you, but I don't speak DTMF ;-) In my experience, I normally see Gateway replaying DTMF to PSTN, or IVR systems, or something like that. I really don't see the use of DTMF between 2 users. Is it just curiosity, or is there another type of an application that requires it? Just curious myself ;-) Alex -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20100320/f11d7eee/attachment.html>