Two IP phones configured in the same office have a phone call in progress when the Call Manager they are registered to fails. Which result is true?
A. The call remains active, and the Cisco IP Phones enable SIP proxy mode for RTP.
B. The call disconnects after the RTP/RTCP keepalive between the IP phones and Call Manager fails.
C. The call remains active, but features such as MOH and Transfer are unavailable for the rest of the call.
D. The call is immediately disconnected.
