Source note · DTMF methods and interoperability failures
RFC 4730 (November 2006) defines the 'kpml' SIP event package, in which a subscriber sends digit patterns in a SUBSCRIBE and matched key presses are reported in NOTIFY messages.
Checked 2026-09-24
- Vendor
- IETF
- Product
- SIP KPML
- Subsystem
- DTMF over signalling
- Deployment
- any
- Region
- not restricted
- Release range
- RFC 4730
- Checked
- 2026-09-24
Sources
- RFC 4730: A Session Initiation Protocol (SIP) Event Package for Key Press Stimulus (KPML) — IETF / RFC Editor · tier 1 standards and regulators · Sections 2 and 4
Cite this note
APA
WarmTransfer. (2026, September 24). DTMF methods and interoperability failures: source note dtmf-interop-kpml-event-package. WarmTransfer. https://warmtransfer.net/knowledge/claims/dtmf-interop-kpml-event-package
BibTeX
@misc{warmtransfer-claim-dtmf-interop-kpml-event-package,
title = {DTMF methods and interoperability failures: source note dtmf-interop-kpml-event-package},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/dtmf-interop-kpml-event-package},
note = {Source note dtmf-interop-kpml-event-package, checked 2026-09-24}
}