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From: Mike_Benna@mindlink.UUCP (Mike Benna)
Newsgroups: comp.dcom.modems
Subject: Re: Testing actual throughtputs
Message-ID: <5055@mindlink.UUCP>
Date: 7 Mar 91 21:20:58 GMT
Organization: MIND LINK! - British Columbia, Canada
Lines: 25

> Harvey Taylor@mindlink.UUCP writes:
> 
> What I would like to see is a thorough comparison of these transmission
> protocols and compression techniques with varying sorts of data.

Actually there are many more considerations than just those you have
investigated in your calculation (for example are you using Xmodem,
Zmodem, UUCP-G, etc.)  So many in fact that it is far easier to learn
what the various protocols do and to use that information to determine
what type of throughputs to expect.  After that, TEST IT in your
application and see what you get before putting down the money.

Marketing people will always try to hype a product (especially in the
computer industry) - it is up to the consumer to understand what he/she
is buying.

As for answering the original question, you should expect to get 1.5
times the throughput from a V.32bis modem as you used to get from a V.32
modem.  On pre-compressed data with V.42 error control (LAPM in
particular) you should see about 1124 cps from a V.32 modem and 1686 cps
from a V.32bis modem.
--
   ---> Mike Benna, Vancouver, B.C., Canada
        MindSpan Technologies Corp. - Video Game Design and Development
 EMAIL: Mike_Benna@mindlink.UUCP  or  ...!van-bc!rsoft!mindlink!Mike_Benna