You are trying to register an H.323-based Cisco TelePresence system to Cisco Unified Communications Manager and a Cisco DX70 system to the Cisco VCS Control. Why do neither of the units want to register?

A.	The H.323-based system needs an E164 number to register to Cisco Unified Communications Manager, and the Cisco DX70 needs to have the MAC address configured first on the Cisco VCS Control.
B.	The H.323-based system needs to register to the Cisco VCS Control with an E.164 number, and the Cisco DX70 needs the TFTP address to register on the Cisco Unified Communications Manager.
C.	Both systems need to register to the Cisco VCS Control, but the H.323-based system needs to have the gatekeeper setting set to “Direct.”
D.	Both systems need to register to the Cisco Unified Communications Manager, as the Cisco VCS Control is used only for firewall traversal.
E.	You need Cisco TelePresence Management Suite to register Cisco TelePresence systems.
F.	You need Cisco TelePresence Server to register Cisco TelePresence systems.