On Thu, 1 Mar 2001, Kevin Wang wrote: > in any low power wireless tech, you really need direct line of sight. no > trees. You'll have to put up a higher pole to get over the trees, or move > around them. More than just visible LoS as well. You want to make sure that the Fresnel area is clear of obstructions if you want the best reception. This is an ovoid space between the two antennae. You also want to watch out for leaf less trees - a signal that works on a cold crisp winters day might be nuked completely by wet green leaves in spring. > > I know about 802.11 wireless ethernet. > > Great speed, but limited range. Unless you add a dish and/or an amp to boost > > the power (dunno if this would work.) Or a Yagi (like the one Lucent sell) or a home made helical antenna (or microwave feed horn or coffee can or...). Active masthead amps aren't legal in most places for the 802.11b stuff. > There are some proprietary point-to-point network solutions, but they're > expensive. $2k per end is the usual price. Range can be upto 10km, though. > search the web, there's lots of information around. Heh, I think you'll find some of the high end ones are a *tad* more expensive than that! We're looking at over 100,000 pounds sterling for a 155Mbps microwave link to a remote campus (several tens of miles away, requiring repeaters on other microwave towers). And don't forget to investigate if you need planning permission for the antenna. Tatty bye, Jim'll -- Subscription/unsubscription/info requests: send e-mail with subject of "subscribe", "unsubscribe", or "info" toWear-Hard Mailing List Archive (searchable): http://wearables.blu.org please, Please, *PLEASE* don't subscribe through a forward/false domain
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