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From: hoffman@pitt.UUCP (Bob Hoffman)
Newsgroups: net.ham-radio
Subject: Re: leased lines
Message-ID: <1160@pitt.UUCP>
Date: Mon, 29-Jul-85 10:30:56 EDT
Article-I.D.: pitt.1160
Posted: Mon Jul 29 10:30:56 1985
Date-Received: Wed, 31-Jul-85 23:31:09 EDT
References: <103@biomed.UUCP>
Reply-To: hoffman@pitt.UUCP (Bob Hoffman)
Organization: Univ. of Pittsburgh Computer Science
Lines: 20

The name you'll want to use when dealing with the telco is
"Local Area Data Channel", or "Local Area Data Service".  We
usually just call them LADS lines.  You will probably want to
get a publication from the telco called "Data Communications
using Local Area Data Channels".  Its number is PUB 41028, dated
June 1979.  This used to be called a "Bell System Technical Reference",
but is probably something else since the divestiture.   All of the
technical questions you raised are answered in this publication.
If you want end-to-end DC continuity, you must ask for it specifically.
As for cost, the ones we have that connect buildings on campus cost
$38 per month per pair ($76/month for a 4-wire DC line).  Using
Bo-Sherrell M1 short-haul modems (actually differential DC line
drivers), we can get no more than 2400 baud on them.

I hope this helps.

	---Bob.
-- 
Bob Hoffman, N3CVL       {allegra, bellcore, cadre, idis, psuvax1}!pitt!hoffman
Pitt Computer Science    hoffman%pitt@csnet-relay