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From: werner@utastro.UUCP
Newsgroups: comp.dcom.modems
Subject: Re: Qubie (Sp?) 2400 External Modem
Message-ID: <1865@utastro.UUCP>
Date: Fri, 5-Jun-87 02:13:06 EDT
Article-I.D.: utastro.1865
Posted: Fri Jun  5 02:13:06 1987
Date-Received: Sun, 7-Jun-87 01:56:51 EDT
References: <9963@decwrl.DEC.COM> <4640@milano.UUCP>
Organization: U. Texas, Astronomy, Austin, TX
Lines: 25
Keywords: 2400 baud modems
Summary: InfoWorld of Jun1, 1987 has Product Comparison of 2,400baud modems


[ InfoWorld of June 1, 1987, page 60 ]

the comparison was done using a telephone connection simulator to ensure
consistency;  controlled amounts of imperfections were injected into the
connection to determine how well each modem worked in the face of common line
defects.  performance was compared measuring the following:
Line Defect Tolerance, Worst-Case-MNP, MNP-Ideal_Conditions.


the results were summarized as follows:

1) the performance and features of the Microcom AX/2400c are hard to beat
   [it was the only one with level 5 MNP(compression) and expensive at $899]

2) the Multi-Tech Systems Multimodem 224E was second best at $649 with best
	performance under noisy conditions but "only" level 4 MNP and *only*
	class A FCC (should not be used in a residential area)

3) the Qubie BT2400E deserves honorable mention for its low price of $209.

NOTE: the comparison is very limited and, probably, not very informative for
	use outside the US or for anything but simple 2,400 Baud connections.

PS: the CTS Datacomm 2424 AMH looks like the WORST modem of the lot !!!