Source note · DTMF methods and interoperability failures
On CUBE (IOS XE 17.6 onwards), SIP DTMF relay methods are rtp-nte (RFC 2833), sip-notify (Cisco proprietary), sip-kpml (RFC 4730) and sip-info, plus G.711 in-band audio, which needs no configuration.
Checked 2026-09-24
- Vendor
- Cisco
- Product
- Cisco Unified Border Element
- Subsystem
- dtmf-relay
- Deployment
- on-premises
- Region
- not restricted
- Release range
- IOS XE 17.6 onwards
- Checked
- 2026-09-24
Sources
- Cisco Unified Border Element Configuration Guide - Cisco IOS XE 17.6 Onwards - DTMF Relay — Cisco Systems · tier 2 current vendor documentation · DTMF Relay chapter, supported methods list
Cite this note
APA
WarmTransfer. (2026, September 24). DTMF methods and interoperability failures: source note dtmf-interop-cube-methods-ios-xe. WarmTransfer. https://warmtransfer.net/knowledge/claims/dtmf-interop-cube-methods-ios-xe
BibTeX
@misc{warmtransfer-claim-dtmf-interop-cube-methods-ios-xe,
title = {DTMF methods and interoperability failures: source note dtmf-interop-cube-methods-ios-xe},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/dtmf-interop-cube-methods-ios-xe},
note = {Source note dtmf-interop-cube-methods-ios-xe, checked 2026-09-24}
}