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New Member

Bandwidth Requirement for VT advantage..

How much BW is required for a Video calls for g729 codec and g.711 calls.

Where to define the codec for video calls.

How to size the BW for calls over LAN as well as for WAN.


Re: Bandwidth Requirement for VT advantage..

There is no g729 or g711 codec for video, it is wideband, h.263, etc. G729 and g711 are for audio calls only.

The VT Advantage video cameras support Wideband video codec, i.e., up to 8128 kbps, which if used is ofcourse recommended only with the same LAN, and H.263 video codec, i.e., from 128 kbps to 1.5 Mbps, over the WAN.

Codec for video calls are defined in System > Region but in terms of bandwidth (128kbps, 384kbps, etc in increments of 64kbps) and not the actual codec.

For connections over the WAN, 128 kbps is the minimum and considered low-quality video, and from 384kbps upwards considered high-quality video. However the actual bandwidth used on the WAN and the QoS configs would be the bit-rate + 20% overhead, which for a video call at 128 kbps would be 154 kbps and for a video call of 384kbps, would be 460 kbps. This bandwidth includes both video and audio channel of the video call.

New Member

Re: Bandwidth Requirement for VT advantage..

Does VT Advantage also negotiate the BW before making a video call? If so, how can we know exactly how much BW the video call use??