In the past, Ajax has experienced several phone outages, one of which lasted over seven hours when the company’s current PBX had a software crash. Telephone communications are critical, so Ajax would like to design the IP telephony solution to be scalable and highly available.

In designing a Cisco Unified Communications Manager clusterfor highest availability, what two options must you include in your design? (Choose two.)

A.
redundant gateway connections to the PSTN

B.
dedicated servers forMoH and conferencing

C.
a 1:1 redundancy scenario in the Cisco Unified Communications Manager cluster

D.
all members of the cluster needing to be in the same LAN or MAN

E.
the deployment of a dedicated publisher and dedicated TFTP server