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Date:      Fri, 2 Oct 1998 08:11:40 -0600
From:      Nate Williams <nate@mt.sri.com>
To:        Zach Heilig <zach@gaffaneys.com>
Cc:        Kris Kennaway <kkennawa@physics.adelaide.edu.au>, Nate Williams <nate@mt.sri.com>, current@FreeBSD.ORG
Subject:   Re: fetch -p
Message-ID:  <199810021411.IAA15231@mt.sri.com>
In-Reply-To: <19981001225125.B29551@znh.org>
References:  <199810011721.LAA10552@mt.sri.com> <Pine.OSF.4.03.9810021256330.20490-100000@mercury.physics.adelaide.edu.au> <19981001225125.B29551@znh.org>

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> > Yes, this was actually my point; on a 14.4k modem without compression I should
> > be getting about 1.4k/s throughput. The figure I got was 16% higher than this
> > just on the downloaded data transfer speed, and PPP adds extra overhead for
> > the protocol (compressing the file by a further 16% is no mean feat :-).
> > 
> > Getting transfer rates of this speed and higher is commonplace for text
> > transfers which can be easily compressed, but this is the first time I'd
> > noticed an already-compressed data stream coming in that fast (which is what
> > makes me suspicious).
> 
> I heard a rumor that the modem <-> phone <-> modem was a syncronous
> connection. 

Whomever told you this rumor was confused.

> In this case, there would be only 8 bits, no start or stop bits.

See above.

> a 14.4K connection would then have raw data rate of 1.8K/sec.

See my previous email for the correct calculation.  Ignore Kris's. :)


Nate

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