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From: bagri@pdn.paradyne.com (Ravi Bagri)
Newsgroups: comp.dcom.modems
Subject: How to evaluate V.42bis compression ?
Message-ID: <1990Jul24.004825.945@pdn.paradyne.com>
Date: 24 Jul 90 00:48:25 GMT
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V.42bis algorithm is supposed to provide 4-to-1 data compression.
This compression ratio is data dependent as pointed out in many
previous postings.

Does anyone know of a good text file to test the through-put of
a V42bis modem ?
Can a 511 or 2047 psuedo-random bit pattern be used as data to 
test the through-put of the modem ?

In simple terms, if I buy a V.42bis modem how can I test it to
see if I am really getting 4-to-1 compression (or close to it) ?

Thanks for your responses in advance.


--
Ravi Bagri
AT&T Paradyne
bagri@pdn.paradyne.com
Tel: 813-530 8417