Which mechanism does the Cisco TelePresence Conductor use to communicate with the call control device?
A. It sends keepalive messages until the H.245 negotiations are completed.
B. It provides a secure FTP channel to use for data transfer.
C. When Cisco TelePresence Conductor receives the signaling for the call, it uses CPL.
D. A SIP connection will use the B2BUA of Cisco TelePresence Conductor.
