A. The gateway waits for the primary Cisco Unified Communications Manager server to come alive.

B. The gateway continues with the MGCP call processing without any interruption.

C. The gateway falls back to the H.323 protocol for further call processing.

D. The MGCP calls are queued up until the Cisco Unified Communications Manager servers are online.

E. The gateway continues to make an attempt to connect to the backup Cisco Unified Communications Manager server.

F. All MGCP call processing is interrupted until the Cisco Unified Communications Manager servers are online.