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From: Reid_Bishop@a68k.UUCP (Reid Bishop)
Newsgroups: comp.sys.amiga.datacomm
Subject: Re: What's the difference between a Supra MNP and MNP-plus?
Message-ID: <Reid_Bishop.3244@a68k.UUCP>
Date: 29 May 91 23:35:04 GMT
Organization: The Arvada 68K BBS
Lines: 57

In a message dated Tue 21 May 91 19:25, Ewaniu@ee.ualberta.ca (darren Ewani
wrote:

 RB> In a sense, MNP5 _can_ and _does_ improve transfer rates on compressed  
RB> files.

 EE> Yes, compared to straight 2400, but not as much as turning
 EE> compression off
 EE> but leaving MNP4 active (see below).

 EE> Turn off compression only, and you'll see the difference.  

I hadn't thought about the difference between MNP4 and MNP5.  I will have to
try your suggestion out and see what difference it makes.

 EE> Since you run a bulletin board, I would suggest that you disable
 EE> compression
 EE> in dial-out mode only, and put this in your dial command string
 EE> rather than the
 EE> modem setup string, then tell your users how to disable compression
 EE> on their
 EE> systems for file transfer.  This will then enable them to use
 EE> compression when
 EE> they log on to read messages, and by disabling compression from their
 EE> end,
 EE> they could increase throughput when they know they are going to
 EE> download
 EE> archived files.

Very good suggestion.  Time to run some tests!  (Of course, I fully intend to
graduate to USR DS modems in the near future.)

Along these lines... do the newer DS modems from USR also implement v.42?  I
know their straight v.32 modems (non-HST) are now v.42, but I have not seen
any advertisements indicating the DS modems including v.42/v.42bis.

 EE> First, I would probably recommend against the average person
 EE> upgrading to a
 EE> MNP/V42 modem if you already have 2400 baud.  You don't get much
 EE> extra for
 EE> throughput.

What about the user experiencing line noise on a constant basis?  Here the
investment in any MNP modem will be a plus.

-- Via DLG Pro v0.97b


~~~~~~~~~~~~~ Somebody's gotta fight for the AMIGA!! ~~~~~~~~~~~~~~~~~

   Reid Bishop-  Customer Support & Programming, M.V. Micro

   UUCP:  boulder!tcr!a68k!Reid_Bishop          [Reid Bishop]

   FIDO:  (1:104/224)

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