Source note · DTMF methods and interoperability failures
In PJSIP, sending RFC 4733 DTMF when the negotiated SDP lacks the telephone-event rtpmap returns PJMEDIA_RTP_EREMNORFC2833; any fallback is up to the application.
Checked 2026-09-24
- Vendor
- PJSIP project
- Product
- PJSIP
- Subsystem
- DTMF
- Deployment
- embedded-library
- Region
- not restricted
- Release range
- latest docs as of 2026-09-24
- Checked
- 2026-09-24
Sources
- DTMF — PJSIP Project documentation — PJSIP project (Teluu) · tier 3 vendor-maintained repositories · Overview
Cite this note
APA
WarmTransfer. (2026, September 24). DTMF methods and interoperability failures: source note dtmf-interop-pjsip-no-telephone-event-error. WarmTransfer. https://warmtransfer.net/knowledge/claims/dtmf-interop-pjsip-no-telephone-event-error
BibTeX
@misc{warmtransfer-claim-dtmf-interop-pjsip-no-telephone-event-error,
title = {DTMF methods and interoperability failures: source note dtmf-interop-pjsip-no-telephone-event-error},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/dtmf-interop-pjsip-no-telephone-event-error},
note = {Source note dtmf-interop-pjsip-no-telephone-event-error, checked 2026-09-24}
}