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Path: utzoo!watmath!clyde!burl!ulysses!gamma!epsilon!zeta!sabre!petrus!bellcore!decvax!genrad!panda!talcott!harvard!seismo!hao!noao!terak!anasazi!john
From: john@anasazi.UUCP (John Moore)
Newsgroups: net.micro
Subject: Re: Networking portables via radio and...
Message-ID: <274@anasazi.UUCP>
Date: Wed, 28-Aug-85 12:55:08 EDT
Article-I.D.: anasazi.274
Posted: Wed Aug 28 12:55:08 1985
Date-Received: Sun, 1-Sep-85 13:17:47 EDT
References: <1018@brl-tgr.ARPA>
Reply-To: john@anasazi.UUCP (John Moore)
Organization: Anasazi, Phoenix Az.
Lines: 24
Summary: Amateur Packet Radio Equipment may be used commercially

In article <1018@brl-tgr.ARPA> Fischer.pa@XEROX.ARPA writes:
>Summary of replies: a few, none extensive or particularly knowledgable (
>I was suprised ).

If you really want to connect portables via radio, you might consider
amateur packet radio technology. Terminal node controllers can be
purchased for less than $300 from several suppliers. They will interface
via audio (and PTT control) to any voice quality radio transceiver
(amateur OR commercial), and will send data at 1200bps half duplex using
a modified HDLC protocol. They are legal for use on the commercial
bands (assuming, of course, that your commercial radio is properly
licensed). They will operate through repeater stations allowing a
walkie-talkie/TNC/portable_pc to communicate throughout an entire
metropolitan area. They communicate via RS232 ASCII with a simple command
set.
    These are currently used by commercial operators
for telemetry, and are also used by the US Govt for data communications
with their hurricane hunter aircraft.


-- 
John Moore (NJ7E)
{decvax|ihnp4|hao}!noao!terak!anasazi!john
(602) 952-8205 (day or evening)