Source note · Unified CM call admission control
Unless AAR is enabled and configured, an inter-location call that Enhanced Locations CAC denies simply ends in a busy signal; there is no automatic PSTN reroute.
inferred · Checked 2026-09-25
- Vendor
- Cisco
- Product
- Unified Communications Manager
- Subsystem
- Automated Alternate Routing
- Deployment
- on-premises
- Region
- not restricted
- Release range
- Release 15 and SUs
- Status
- inferred
- Checked
- 2026-09-25
Sources
- System Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Configure Enhanced Locations Call Admission Control — Cisco Systems · tier 2 current vendor documentation · Enhanced Locations Call Admission Control Overview; combined with Configure Call Routing AAR enable procedure (cisco-cucm-sysconfig-15-call-routing)
Cite this note
APA
WarmTransfer. (2026, September 25). Unified CM call admission control: source note cucm-call-admission-control-busy-without-aar. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-call-admission-control-busy-without-aar
BibTeX
@misc{warmtransfer-claim-cucm-call-admission-control-busy-without-aar,
title = {Unified CM call admission control: source note cucm-call-admission-control-busy-without-aar},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/cucm-call-admission-control-busy-without-aar},
note = {Source note cucm-call-admission-control-busy-without-aar, checked 2026-09-25}
}