Hi, I looked around in the mailing list and don't see any conclusive solution to this problem. I have a setup like this below. Webrtc client -----FS----sonus gateway. The Webrtc client is sending INFO as DTMF. The FS currently bridges the call to the gateway and in the outbound leg uses rfc2833. Problem: Some calls suffer from missing DTMF and repeated duplicate DTMF. Solution: Use INFO all through to sonus gateway ? How do I achieve this ? In the internal profile if I change the "dtmf-type" to "info". Nothing really happens, it still sends rfc2833 dtmf. I believe it is because of "liberal-dtmf" is "true".[accept any but always offer rfc2833] But if I change "liberal-dtmf" to "false". I get "channel is not configured to use info dtmf". Is this a bug ? Is there any way around it ? Any input much appreciated. Thank you, Sharath