A Trusted Relay Point is in most instances allocated after the call is answered, so a call that fails because the TRP cannot be allocated may give the user fast-busy tone after answering.
Checked 2026-09-30
In most instances, TRP is allocated after users answer the call, so if a call fails due to failure to allocate the TRP, users may receive fast-busy tone after answering the call.
- Vendor
- Cisco
- Product
- Unified Communications Manager
- Subsystem
- trusted-relay-point
- Deployment
- on-premises
- Region
- not restricted
- Release range
- Release 15 and SUs as of 2026-09-30
- Checked
- 2026-09-30
Sources
- System Configuration Guide for Cisco Unified Communications Manager Release 15 and SUs - Configure Media Resources — Cisco Systems · tier 2 current vendor documentation · section 'Trusted Relay Points Interactions and Restrictions'
Cite this note
APA
WarmTransfer. (2026, September 30). Troubleshooting Unified CM media resource allocation failures: source note cucm-media-resource-failures-trp-fail-fast-busy. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-media-resource-failures-trp-fail-fast-busy
BibTeX
@misc{warmtransfer-claim-cucm-media-resource-failures-trp-fail-fast-busy,
title = {Troubleshooting Unified CM media resource allocation failures: source note cucm-media-resource-failures-trp-fail-fast-busy},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-media-resource-failures-trp-fail-fast-busy},
note = {Source note cucm-media-resource-failures-trp-fail-fast-busy, checked 2026-09-30}
}