Benny, I'll send you the Wireshark capture for the pjsip 1.3 version (in that case I can detect the incoming dtmf). in the next email I'll send you the pjSip log. thanks in advance, Jose -------------- next part -------------- A non-text attachment was scrubbed... Name: rtp_1.3_4 Type: application/octet-stream Size: 414024 bytes Desc: not available URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20100701/6c344252/attachment-0001.3_4>