What is rfc2833 DTMF?
RFC2833 is the standards-based mechanism used to send DTMF digits in-band (RTP) that is supported by many vendors in the industry. Unfortunately, RFC2833 (in band) is not supported on older “Type A” Cisco IP phones (7905/7910/7940/7960).
Does G711 DTMF need to be converted to rfc2833?
3- It does in the way that the carrier explicitly says that they do not deal with inband audio G711 DTMF, that their requirement is RFC2833 and the callers and my customer UC infrastructure must comply or do the conversion themselves.
How reliable is inband DTMF?
Transmission carried Inband DTMF is only considered to be reliable when the G711 (non-compressed) codec is used. If G729 is being used and the DTMF is set to use Inband it usually fails due to the compression.
What is the difference between signaling and rfc2833?
Signaling is normally not used again until the call is ended or a supplementary service (hold, park, transfer, etc.) is initiated. RFC2833 is the standards-based mechanism used to send DTMF digits in-band (RTP) that is supported by many vendors in the industry.