A matter of quick video bandwidth

Hi all

I have a question... And hoped for clarification on the video bandwidth used by a call from VC.

If you see the attached screenshot for recall of an end point for the call is 384 Kbps. But if you notice that the transmission (199 kbps) video and video reception (221 kb/s) which is equal to 420 Kbps which is far superior to 384 kbit/s limited to this call. This would mean that you will have to fund 384 Kbps X 2 = 768 Kbps (+ overhead) for this call on the network of the endpoint. Correct me if I'm wrong?

It's my understanding that I read somewhere already that bandwidth is always symmetric for VC. If you need 1 MB/s download for a call, then you must also 1 MB/s upload. And that would explain why we see more then 384 Kbps for show + reception below.

Thanks in advance...

Kind regards

MILIN

No, a 384 k call needs 384 KB of bandwidth.  It is 384 k up and down at the same time, you do not add the two numbers together.

Similar to when we talk of a network switch, a 10 MB switch port 10 MB in each direction at the same time - it is not a 20 MB switch port.

To try to put it in an example from the physical world, imagine that the "bandwidth" is a window... you can make the light through the window, and you could also do light through it in the opposite direction.  If you a light through it in both directions at the same time, doesn't the window twice as much.

Wayne

Tags: Cisco Support

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