Path: utzoo!attcan!uunet!murtoa.cs.mu.oz.au!bruce!trlluna!tyers
From: tyers@trlluna.trl.oz (P Tyers)
Newsgroups: comp.protocols.appletalk
Subject: geographically distributed localtalk
Keywords: appletalk at a distance, radio networks
Message-ID: <698@trlluna.trl.oz>
Date: 5 Jun 89 08:12:30 GMT
Organization: Telecom Research Labs,IPF,Melbourne, Australia
Lines: 42


I'm mailing this on behalf of my old school and would appreciate some help.

A number of rural Australian secondary schools have banded together to
present computer science classes over a distributed network of Macintoshes.
They are interconnected by a voice repeater system (ie not a digipeater) and
radio modems along with netcomm r-bridges (seemably appletalk to rs232 low
speed bridges). Diagram below shows approximate configuration
Where MAC represents about 5 Macintoshes on appletalk.

MAC--RBRIDGE--MODEM--TX----------------------------------------
					        	      |
							      |
							      |
MAC--RBRIDGE--MODEM--TX------------------------------------|  |
							   |  |
							REPEATER
							   |  |
MAC--RBRIDGE--MODEM--TX-------------------------------------  |
							      |
							      |
							      |
MAC--RBRIDGE--MODEM--TX----------------------------------------

This configuration was proposed to them by a "consultant" and while it works
on a point to point basis blows up when used in a fully networked
configuration. The blow up seems to occur because the r-bridges get most
confused when they see signals from greater than one other r-bridge (as
might be expected!).

The schools own the MAC's and the radio system, they can ditch the modems
and the r-bridges.

Has anyone successfully networked MAC's over a distributed radio system, if
so, can you mail me the configuration and manufacturers names please?

Many thanks in advance.
-- 
P Tyers, Tel. +61-(0)3-5416794   JANET tyers%trlluna.oz@uk.ac.ucl.cs
ACSnet 	tyers@trlluna.oz   UUCP {uunet,hplabs,ukc}!munnari!trlluna.oz!tyers
CSnet	tyers@trlluna.oz   ARPAnet tyers%trlluna.oz@uunet.uu.net
MAIL: Telecom Research Laboratories,P.O. Box 249,Clayton,VICTORIA 3168,AUSTRALIA