Source note · Unified CM call admission control

When Enhanced Locations CAC finds no bandwidth available for a call, Unified CM rejects the call and the caller hears a busy signal.

Checked 2026-09-25

If bandwidth is not available for a particular call, the call is rejected with a busy signal.

Vendor: Cisco
Product: Unified Communications Manager
Subsystem: Enhanced Locations CAC
Deployment: on-premises
Region: not restricted
Release range: Release 15 and SUs
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

Cite this note

APA

WarmTransfer. (2026, September 25). Unified CM call admission control: source note cucm-call-admission-control-busy-on-no-bandwidth. WarmTransfer. https://warmtransfer.net/knowledge/claims/cucm-call-admission-control-busy-on-no-bandwidth

BibTeX

@misc{warmtransfer-claim-cucm-call-admission-control-busy-on-no-bandwidth,
  title  = {Unified CM call admission control: source note cucm-call-admission-control-busy-on-no-bandwidth},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/claims/cucm-call-admission-control-busy-on-no-bandwidth},
  note   = {Source note cucm-call-admission-control-busy-on-no-bandwidth, checked 2026-09-25}
}

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