Microsoft Office Communicator is being integrated with a Cisco Unified IP Phone for remote call control. What is the purpose of the Cisco Unified Presence server?
A.
SIP/SIMPLE control of the Cisco Unified IP Phone
B.
presence federation between Cisco Unified Communications Manager and Microsoft Office Communications Server
C.
Cisco Unified Presence is not used in this integration
D.
converting CSTA (ECMA TR-87) messaging used by Microsoft Office Communications Server to CTI messaging used by Cisco Unified Communications Manager, and vice versa