Path: utzoo!attcan!uunet!mcsun!sunic!uupsi!njin!rutgers!tut.cis.ohio-state.edu!ucbvax!van-bc!rsoft!mindlink!a186
From: a186@mindlink.UUCP (Harvey Taylor)
Newsgroups: comp.sys.amiga
Subject: Re: Dnet
Message-ID: <1275@mindlink.UUCP>
Date: 9 Mar 90 03:06:39 GMT
Organization: MIND LINK! - British Columbia, Canada
Lines: 30

In <1990Mar7.000117.6984@ncsuvx.ncsu.edu>, ml@ecerl3.ncsu.edu writes:
>       [stuff about DNet handshaking]
>
> A semi-related question about throughput:
>
>The modem does all sorts of data compression techniques to get its speed.
>Protocols like Zmodem also do compression.

    This is an error.

>Will the compression done by Zmodem (or "compress" or "arc" or
>"squeeze"...) likely *decrease* the transmission rate when using data
>compression modes (MNP or PEP) on the modem?  (since applying a
>compression technique to data which is already well compressed often
>yields *worse* results).
>
   You'll probably get lots of corrections about Zmodem. Anyway, that
 aside, the interesting question is about modem compression and
 offline compression interaction. As far as I know, the only modem
 compression protocol which does not yield worse results is the recently
 standardized V.42bis. This protocol detects expansion and passes an
 offline compressed file untouched.
 <-Harvey

   "I'll help you if I can; I'll kill you if I must.
    I'll kill you if I can; I'll help you if I must.
    The peacock spreads his fan." - L. Cohen
      Harvey Taylor      Meta Media Productions
       uunet!van-bc!rsoft!mindlink!Harvey_Taylor
               a186@mindlink.UUCP