In the IOS 15.1 interoperability guide, hardware MTPs support only G.711 a-law and G.711 u-law, and only one codec is supported for each MTP profile.
Checked 2026-09-30
- Vendor
- Cisco
- Product
- Cisco IOS voice gateway DSP farm
- Subsystem
- media-termination-point
- Deployment
- on-premises
- Region
- not restricted
- Release range
- Cisco IOS Release 15.1 guide; not confirmed for IOS XE
- Checked
- 2026-09-30
Sources
- Cisco Unified Communications Manager and Cisco IOS Interoperability Guide, Release 15.1 - Configuring Enhanced Conferencing and Transcoding for Voice Gateway Routers — Cisco Systems · tier 2 current vendor documentation · chapter 'Configuring Enhanced Conferencing and Transcoding for Voice Gateway Routers', MTP restrictions
Cite this note
APA
WarmTransfer. (2026, September 30). Troubleshooting Unified CM media resource allocation failures: source note cucm-media-resource-failures-ios-hw-mtp-g711. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-media-resource-failures-ios-hw-mtp-g711
BibTeX
@misc{warmtransfer-claim-cucm-media-resource-failures-ios-hw-mtp-g711,
title = {Troubleshooting Unified CM media resource allocation failures: source note cucm-media-resource-failures-ios-hw-mtp-g711},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-media-resource-failures-ios-hw-mtp-g711},
note = {Source note cucm-media-resource-failures-ios-hw-mtp-g711, checked 2026-09-30}
}