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From: mdv@comtst.UUCP (Mike Verstegen)
Newsgroups: comp.dcom.modems
Subject: Telebit Fails under impairments in PC Magazine tests
Message-ID: <326@comtst.UUCP>
Date: 27 Nov 90 18:44:39 GMT
Organization: Domain Systems Inc., WPB, FL
Lines: 26

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?

On a related note, I recently did an experiment with our connection to
UUNET with respect to through-put rate. Previously we had been using
MCI and get throughput (logged by HDB uucp xferstats) of about 800
bytes/sec. I then changed the UUNET number to include the 10288 AT&T
selection prefix, and now we're getting 1050 bytes/sec throughput.
The 30% increase certainly makes up for the few percent difference
in cost.

Mike
-- 
Mike Verstegen          Domain Systems, Inc           Voice +1 407 686-7911
..!uunet!comtst!mdv     5840 Corporate Way #100       Fax   +1 407 478-2542
mdv@domain.com          West Palm Beach, FL 33407