Yealink SIP-T2 SERIES Administrator's Manual page 850

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
4. Tap the Save soft key to accept the change.
To active the call video feature and configure the auto video feature via web user
interface:
1. Click on Settings->Video.
2. Select the desired value from the pull-down list of Video Active.
3. Select the desired value from the pull-down list of Auto Start Video.
4. Select the desired value from the pull-down list of Auto Answer Video Mute.
5. Click Confirm to accept the change.
CODEC is an abbreviation of COmTap-DEComTap, capable of coding or decoding a
digital data stream or signal by implementing an algorithm. The object of the algorithm
is to represent the high-fidelity video signal with minimum number of bits while retaining
the quality. This can effectively reduce the frame size and the bandwidth required for
video transmission.
The video codec that the phone uses to establish a call should be supported by the SIP
server. When placing a call, the IP phone will offer the enabled video codec list to the
server and then use the video codec negotiated with the called party according to the
priority.
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