Configuring Video Features6852. Select the desired value from the pull-down list of Video Active.3. Click Confirm to accept the change.Video CodecsCODEC is an abbreviation of COmTap-DEComTap, capable of coding or decoding a digital datastream or signal by implementing an algorithm. The object of the algorithm is to represent thehigh-fidelity video signal with minimum number of bits while retaining the quality. This caneffectively 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 thenuse the video codec negotiated with the called party according to the priority.RTPmapCodecs and priorities of these codecs are configurable on a per-line basis. The attribute “rtpmap”is used to define a mapping from RTP payload codes to a codec, clock rate and other encodingparameters.The following table lists the video codecs supported by SIP-T58V/A phone model:Name MIME Type Bit Rate Frame Rate Frame SizeH.264 BP H264/90000 90 kbps to2048 kbps 5 fps to30 fpsTx: CIF, 360P, W448P,720PRx: Conventional SizeBelow 720PH.264 HP H264/90000VP8 VP8/90000 128kbps to2048 kbps
