How is a H.323 MCU defined in Cisco CallManager so that H.323 endpoints can communicate with endpoints that are controlled by Cisco CallManager?

A.
as a H.320 gateway

B.
as a H.323 gateway

C.
as a gatekeeper-controlled H.225 trunk

D.
as a gatekeeper-controlled intercluster trunk

Explanation:

H.323 calls from Cisco Callmanager to the MCU do not necessarily have to go through the gatekeeper. The MCU can be configured directly in the Cisco CallManager as an H.323 gateway device. This is only applicable in an all-SCCP network or where all of the H.323 endpoints are also registered directly with the Cisco CallManager.
So B is the correct answer.