Source note · SIP trunk carrier turn-up and acceptance testing
On CUBE (IOS XE 17.6 onwards) the documented DTMF relay methods for SIP are rtp-nte (RFC 2833 NTE), sip-kpml (RFC 4730), sip-notify (Cisco proprietary), sip-info and cisco-rtp (discontinued); in-band DTMF in G.711 audio needs no configuration.
Checked 2026-09-25
- Vendor
- Cisco
- Product
- Cisco Unified Border Element (CUBE)
- Subsystem
- dtmf
- Deployment
- on-premises
- Region
- not restricted
- Release range
- IOS XE 17.6 onwards
- Checked
- 2026-09-25
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, DTMF relay methods overview
Cite this note
APA
WarmTransfer. (2026, September 25). SIP trunk carrier turn-up and acceptance testing: source note sip-trunk-carrier-turn-up-cube-dtmf-methods. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-trunk-carrier-turn-up-cube-dtmf-methods
BibTeX
@misc{warmtransfer-claim-sip-trunk-carrier-turn-up-cube-dtmf-methods,
title = {SIP trunk carrier turn-up and acceptance testing: source note sip-trunk-carrier-turn-up-cube-dtmf-methods},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-trunk-carrier-turn-up-cube-dtmf-methods},
note = {Source note sip-trunk-carrier-turn-up-cube-dtmf-methods, checked 2026-09-25}
}