Source note · DTMF methods and interoperability failures
Payload type 101 for telephone-event is a common vendor default rather than a value fixed by the standard, so a far end may legitimately negotiate a different dynamic value.
inferred · Checked 2026-09-24
- Vendor
- multi-vendor
- Product
- RTP telephone-event payload
- Subsystem
- SDP negotiation
- Deployment
- any
- Region
- not restricted
- Release range
- current as of 2026-09-24
- Status
- inferred
- Checked
- 2026-09-24
Sources
- RFC 4733: RTP Payload for DTMF Digits, Telephony Tones, and Telephony Signals — IETF / RFC Editor · tier 1 standards and regulators · Section 2.1 (dynamic payload type), read with Genesys external trunk settings DTMF Payload default 101
Cite this note
APA
WarmTransfer. (2026, September 24). DTMF methods and interoperability failures: source note dtmf-interop-pt-101-is-convention. WarmTransfer. https://warmtransfer.net/knowledge/claims/dtmf-interop-pt-101-is-convention
BibTeX
@misc{warmtransfer-claim-dtmf-interop-pt-101-is-convention,
title = {DTMF methods and interoperability failures: source note dtmf-interop-pt-101-is-convention},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/dtmf-interop-pt-101-is-convention},
note = {Source note dtmf-interop-pt-101-is-convention, checked 2026-09-24}
}