The Release 15 Music On Hold chapter describes the outcome of an MTP being invoked in a call leg at a multicast MoH site in two different ways: under Restrictions, Unified CM falls back to unicast MOH; under Troubleshooting, the caller receives silence instead of Music On Hold.
disputed · Checked 2026-09-30
When an MTP resource gets invoked in a call leg at a site that is using multicast MoH, the caller receives silence instead of Music On Hold.
- Vendor
- Cisco
- Product
- Unified Communications Manager
- Subsystem
- music-on-hold
- Deployment
- on-premises
- Region
- not restricted
- Release range
- Release 15 and SUs as of 2026-09-30
- Status
- disputed
- Checked
- 2026-09-30
Sources
- Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Music On Hold — Cisco Systems · tier 2 current vendor documentation · sections 'Music On Hold Restrictions' and 'Music On Hold Troubleshooting' (Music On Hold Does Not Play on Phone)
Cite this note
APA
WarmTransfer. (2026, September 30). Troubleshooting Unified CM media resource allocation failures: source note cucm-media-resource-failures-moh-mtp-multicast-outcome. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-media-resource-failures-moh-mtp-multicast-outcome
BibTeX
@misc{warmtransfer-claim-cucm-media-resource-failures-moh-mtp-multicast-outcome,
title = {Troubleshooting Unified CM media resource allocation failures: source note cucm-media-resource-failures-moh-mtp-multicast-outcome},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-media-resource-failures-moh-mtp-multicast-outcome},
note = {Source note cucm-media-resource-failures-moh-mtp-multicast-outcome, checked 2026-09-30}
}