call admission control (CAC) is used in the Unified CCE branch-office call flow
model (also known as the Centralized Model). This means that all servers
(Unified CVP, Unified CCE, Unified Communications Manager, and SIP Proxy
server) are centralized in one or two data centers, and each branch office.
Configure Unified Communications Manager to use the Ingress gateway
instead of Unified CVP as the originating location of the call. This
configuration ensures that CAC can be properly adjusted based on the locations
of the calling endpoint and the phone.
Do not define
Unified CVP as a gateway device in Unified Communications Manager.