Refer to the exhibit.
You have received a trouble ticket stating that users cannot place calls to the PSTN. During testing you discover the gateway is not switching to the secondary call agent when the primary call agent is unreachable.
What needs to be done to allow the MGCP gateway to use a different call agent if the primary fails?
A.
The ccm-manager fallback-mgcp command needs to be added to the gateway.
B.
The ccm-manager redundant-host command needs to be added to the gateway.
C.
A Cisco Unified CallManager group that includes the secondary call agent needs to be assigned to the gateway.
D.
The gateway needs to be defined as a non-gatekeeper-controlled intercluster trunk with the secondary Cisco Unified CallManager defined.