Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!newstop!texsun!csccat!adept!alan
From: alan@adept.UUCP (Alan Ruffer)
Newsgroups: comp.dcom.modems
Subject: Re: Telebit Fails under impairments in PC Magazine tests
Message-ID: <335@adept.UUCP>
Date: 29 Nov 90 22:12:08 GMT
References: <326@comtst.UUCP>
Reply-To: alan@adept.UUCP (Alan Ruffer)
Organization: Perfect Partners Inc., Sulphur, LA
Lines: 30

In article <326@comtst.UUCP> mdv@comtst.UUCP (Mike Verstegen) writes:
>In the December 11, 1990 issue of PC Magazine, high speed dialup modems
>are evaluated. The Telebit T2500 "was not successful for any of our 24
>impaired line tests, despite repeated tries and extensive consultation
>with the company." Though the tests were primarily for V.32 mode, the
>same failures were obtained in the PEP mode.
>
>The impairments used were "EIA-standard impairments" 1V32 through 6V32.
>Does anyone know what these are and how well they simulate impairments
>on real telephone lines? We have used Trailblazer+ modem (close relative
>of the T2500) for inbound and outbound, domestic and international with
>no problems from the modem. Are we just lucky, or did Telebit get a
>bad review?
>

I have not seen the magazine tests you refer to in your posting, and do not
know about these simulated impairments.  All I can base my opinions on is
1 year of real-world experience with using a T2500 for news/mail/BBS line
dial-in.  The phone lines here tend to have noise and are otherwise dirty.
The Telebit has been a magnificent performer during this period for us.
The majority of the connections are either 2400 or 9600 PEP with T1000's
on the other end.  There are few V.32 modems around here to give any
opinion as to how well it does in that mode.  Perhaps these magazine tests
(which I have been doubtful of for years now) are not really good indicators
of real world conditions.  Also PEP connections are superior under less
than optimum line conditions when compared with v.32.
Conclusion:  Bad review.
You are lucky to have a Telebit.

Alan