A customer has a conferencing network that is used by only H.323 endpoints. The customer wants the ability to include SIP endpoints in conferences. What needs to be done to allow SIP and H.323 endpoints in the same conferences?

A.
Cluster H.323 MCUs with SIP MCUs.

B.
Segment the MCU ports as either H.323 or SIP ports.

C.
Configure the MCU to register with a gatekeeper and SIP proxy servers, and configure the SIP protocol parameters.

D.
Supply the SIP endpoint users with H.323 terminals. Conferences with both H.323 and SIP endpoints are not supported.