Newsgroups: comp.robotics
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From: dkent@world.std.com (David Kent)
Subject: Re: RS232 - MODEM
Message-ID: <CvxJHv.LJy@world.std.com>
Organization: The World Public Access UNIX, Brookline, MA
References: <Cvt2Az.7oE@news.informatik.uni-stuttgart.de>
Date: Sat, 10 Sep 1994 19:58:43 GMT
Lines: 21

rausch@hermes.informatik.uni-stuttgart.de (Alexander Rausch) writes:

>We are running three mobile robots using wireless RS232 Modems to communicate
>with them from stationary UNIX-workstations. Unfortunately the Modems are
>interfering each other although they use different frequencies. So far no
>company could help with alternative products (we asked about 4 companies).

>Does anyone has experience with operating three or more pairs of modems the same
>time successfully? Any help is appreciated. We require at least 9600 BAUD for
>each pair of modems.

There are several wireless modems that should work next to each other.  I 
have had good luck with the Proxim spread spectrum modems, but I'm sure 
many other manufacturers products will also meet your needs.  There is a 
list of wireless modem products and manufacturers at the following 
anonymous ftp site:

ftp://csd4.csd.uwm.edu/pub/Portables/Wireless/wireless-modems
gopher://csd4.csd.uwm.edu

Good Luck, David. (dkent@world.std.com)
