DTMF RFC2833 - Not Working

[ggflow]

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

[Admin]

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