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We need to set up a wireless bridge over a two-mile
link. We have excellent line-of-sight between the two end points of the
link. The purpose of the wireless bridge will be to support an h.323
video conference during a distance learning presentation at a large conference
in April.
The other locations participating in the video
conference will have wired T1 connections. We would
like to run the video conference at 1 Mbps or more in order to
achieve a high quality video presentation.
We would like to keep cost to a minimum.
Here are some of the alternatives we have considered for the wireless
link: 1) a commodity 802.11b bridge (at 11 Mbps) using 24 dB
antennas; 2) an 802.11b (Dlink enhanced to 22 Mbps)
bridge using 24 dB antennas; an 802.11g bridge (Dlink or Linksys) using 24
dB antennas; 3) an 802.11a bridge running at 108 Mbps (Airaya)
using 18 dB patch antennas; 4) a Proxim Tsunami point-to-point
full-duplex bridge running at 20 Mbps.
A live h.323 video-conference
is not very forgiving when attempted over a poorly
performing network. I would like to know if anyone has any experience with
high-speed (768 kbps to 1.5 Mbps) h.323 video conferences over various types of
unlicensed wireless links, and if anyone has any suggestions that
will help ensure that our presentation is successful.
Thank you in advance for your comments or
suggestions!
Alan Friedman
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