Newsgroups: comp.robotics
Path: brunix!sgiblab!news.cs.indiana.edu!hess@cs.indiana.edu
From: "Caleb Hess" <hess@cs.indiana.edu>
Subject: Re: Wireless RS232 link
Message-ID: <1994Apr26.145932.3197@news.cs.indiana.edu>
Organization: Computer Science, Indiana University
References: <24.4764.2500.0NB2DC1D@pcohio.com> <2pic9i$kva@search01.news.aol.com>
Date: Tue, 26 Apr 1994 14:59:25 -0500
Lines: 22

In article <2pic9i$kva@search01.news.aol.com>, JB PIR2 <jbpir2@aol.com> wrote:
>In article <24.4764.2500.0NB2DC1D@pcohio.com>, andrew.jenkins@pcohio.com
>(Andrew Jenkins) writes:
>
>Check out the ComRad unit. A full duplex RS 232 900 mhz spread spectrum for
>only $ 300 a pair. I run my Bots using it and can't tell the difference between
>them and a wire. 150 range through walls and all. I sell them to the Robot
>community at 
>a hair above my cost.
>

Comrad sells them direct.  7210 Georgetown Rd. Suite 300/400
			   Indianapolis, IN  46268
			   317-290-9107

You should be aware that these units use the same 902 - 928 MHz band as
most wireless LAN gear.  With an error-correction protocol they can
coexist; however, the two systems will appear as noise to each other.

And by the way, the Comrad CCL901 boxes that we are using are not spread 
spectrum.  They allow you to switch between two pairs of channels.  The 
NCR wireless LAN stuff (WaveLAN, AirLAN, etc) is spread-spectrum.
