Cisco Telepresence Systems that are calling from a CUCM cluster to an H.323 registered device on a Cisco VCS Control do not work. However, calls from the H.323 VCS registered devices to the same CUCM registered systems do work. What are two possible reasons?

A.	the call from CUCM to VCS Control does not match any search rule
B.	Calls from CUCM add ":5060" or ":5061" after the SIP address, unlike the VCS Control
C.	both systems do not support TLS encryption
D.	the SIP trunk has not enabled bidirectional mode
E.	Cisco VCS Control is registered in the wrong partition