E21 series supports H264 standard, which provides better video
quality at substantially lower bit rates than previous standards.
Codec Resolution: R20 series supports four resolutions: QCIF, CIF,
VGA, 4CIF and 720P.
Codec Bitrate: To configure bit rates of video stream.
Codec Payload: To configure RTP audio video profile.
To configure RTP audio video profile for DTMF and its
payload type.
Type: Support Inband, Info, RFC2833 or their
combination.
How To Notify DTMF: Only available when DTMF Type
is Info.
DTMF Payload: To configure payload type for DTMF.