The Greene Oat Company has a central site that is connected to a branch office via a 1.544-Mbps T1 Frame Relay circuit. The branch office has 20 video-enabled users in it. Least cost routing is used. It is required that all 20 users are able to use video services simultaneously for internal calls. Which solution best meets this objective?
A.
Route video calls up to the central site in order to save on toll charges.
B.
Upgrade the 1.544-Mbps T1 circuit to higher bandwidth.
C.
Deploy an IP-videoconferencing video gateway at the branch office and not bother with LCR.
D.
Use the Retry Video Call as Audio feature to reroute video calls as voice-only calls if they exceed the available bandwidth.