DTMF RFC2833 - Not Working

Hi Team,

Im testing FreeSBC and have my Yealink headsets set to RFC2833 for DTMF but that doesn't seem to work. Only SIP INFO seems to work with DTMF, is there a setting to enable RFC2833?

Regards,

Glen Ganderton

Hi

SBC is compatible with RFC2833. But if you want to transcode between RFC2833 and SIP INFO you need to use a transcoding device. To better understand the RFC2833 problem you can run RTP capture on ProSBC, please flow the link below and analyze the RTPs with wireshark;

https://docs.telcobridges.com/mediawiki/index.php/VoIP_Ethernet_Capture_FreeSBC_A