This installation is a single Cisco Unified Communications Manager cluster with Cisco IP Phones
in two branch locations. Users report that sometimes when they call from one branch to the other
branch, they get a fast busy. Upon investigation, you notice that the first 10 calls always go
through from one branch to the next. However, when the 11th simultaneous call is attempted, it
always gets a fast busy.
Which option is the cause of the fast busy of the 11th phone?
A.
Phones in one of the branch offices are in a CSS that is not in the partition of the phones in the
other branch.
B.
A gatekeeper has been configured to block the 11th call.
C.
The Cisco Unified CM cluster has been configured with locations that have insufficient
bandwidth allocated.
D.
The Cisco Unified CM cluster has SIP trunks that are misconfigured to the two branch offices.