Path: utzoo!censor!geac!torsqnt!news-server.csri.toronto.edu!cs.utexas.edu!uunet!hayes!tnixon
From: tnixon@hayes.uucp
Newsgroups: comp.dcom.modems
Subject: Re: CIS & USR DS
Message-ID: <3721.278c7b02@hayes.uucp>
Date: 10 Jan 91 14:32:34 GMT
References: <49@ns.UUCP> <3716.27886916@hayes.uucp> <1991Jan08.171427.29629@nstar.rn.com>
Distribution: na
Organization: Hayes Microcomputer Products, Norcross, GA
Lines: 29

In article <1991Jan08.171427.29629@nstar.rn.com>, larry@nstar.rn.com
(Larry Snyder) writes: 

>>As to why they chose DS modems rather than just V.32s, it was 
>>probably because that was what was available at the time in 
> 
> but wouldn't you think that they would at least keep the HST
> modulation "turned on" so those with DS modems could take advantage
> of the increased throughput over V.32?

No, because that would also make the HST modulation available to 
HST-only users (not DS).  Once CIS makes a service available, it is 
extremely difficult to take it back, so they'd be stuck providing 
HST modulation forever (and therefore locked into buying their 
modems from USR).

> BTW - what is the speed of the line from the major and minor hub
> cities back to CIS?  Are they using 56KB, T1 or X.25?

Depends on the city.  Their internal network protocol is NOT X.25.  
Some of the links to smaller cities are 9600bps, most are 56Kbps, 
and some of the larger cities (i.e., all of the ones which currently 
have 9600bps service) are on T1.

-- 
Toby Nixon, Principal Engineer    | Voice   +1-404-449-8791  Telex 151243420
Hayes Microcomputer Products Inc. | Fax     +1-404-447-0178  CIS   70271,404
P.O. Box 105203                   | UUCP uunet!hayes!tnixon  AT&T    !tnixon
Atlanta, Georgia  30348  USA      | Internet       hayes!tnixon@uunet.uu.net