Source note · SIP 488 and codec negotiation failures
From Unified CM 14SU3, secure MTP is supported from the gateway side for DTMF translation with IOS XE 17.10.1a or later gateways.
Checked 2026-09-25
- Vendor
- Cisco
- Product
- Unified Communications Manager
- Subsystem
- media resources
- Deployment
- on-premises, dedicated-instance
- Region
- not restricted
- Release range
- 14SU3 and later with IOS XE 17.10.1a and later
- Checked
- 2026-09-25
Sources
- System Configuration Guide for Cisco Unified Communications Manager Release 15 and SUs - Configure Media Resources — Cisco Systems · tier 2 current vendor documentation · Configure Media Resources - Media Termination Points (secure MTP note)
Cite this note
APA
WarmTransfer. (2026, September 25). SIP 488 and codec negotiation failures: source note sip-488-codec-failures-cucm-secure-mtp-14su3. WarmTransfer. https://warmtransfer.net/knowledge/claims/sip-488-codec-failures-cucm-secure-mtp-14su3
BibTeX
@misc{warmtransfer-claim-sip-488-codec-failures-cucm-secure-mtp-14su3,
title = {SIP 488 and codec negotiation failures: source note sip-488-codec-failures-cucm-secure-mtp-14su3},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/sip-488-codec-failures-cucm-secure-mtp-14su3},
note = {Source note sip-488-codec-failures-cucm-secure-mtp-14su3, checked 2026-09-25}
}