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Video teleconferencing questions

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by lovetheavguy

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IT Manager

I need to ask about using a company's network for VTC.

Here's what I want to do.
I want to start a business whereas I come to "a" business and setup the nessecary equiptment to do small or large room VTC over the company's exsisting T-1 LAN.
I want to do it H.323 over IP and not ISDN.

For instance, if I use a Polycom unit that will require its own IP address on the network or bring my own loaded up laptop (software, sound and webcam enabled) jump on the company's network and perform.
Will it reck havic on the networks resources ?
Will it be reliable enough?
Will you, as a SysAdmin, object to it and why?

3 replies

by some guy in seattle

For a project I was working on for something along the same lines...I found that a decent 30fps videoconferencing picture is a bare minimum without having too choppy or fragmented a picture. Tests with NetMeeting showed that this kind of quality takes approximately 80% of a T1's bandwidth, or ~1.2Mbps or so. This is fine if you don't intend to run anything else on this line. Depending on the compression rate the Polycom device offers you (I'd be surprised if it was any better because of problems with graininess), this is about the best you can do.

Reliability is fine, again if there's nothing else happening on the T1.

My only objections as a sysadmin is the extreme bandwidth used. Plus security hazards if things like application sharing is enabled.

Hope that helps -

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