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Article #5306

Re: why is Inbound so much Slower than Outbound?

#5306
From: Bruce D. Becker
Date: Tue, 20 Aug 1991 16:33
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In article <1991Aug15.234709.2532@mccc.edu> pjh@mccc.edu (Pete Holsberg) writes:
|In article <PCG.91Aug11170926@aberdb.aber.ac.uk> pcg@aber.ac.uk (Piercarlo Grandi) writes:
|=This is excellent advice. Bill is being a bit greedy and starry eyed --
|=1718 CPS is 20% higher than the rated top speed of a TB 2500, and this
|=should have made him suspect that something funny is happening.
|=
|=I think that to get 1718 CPS for real from a TB 2500 you need a special
|=dispensation from Shannon himself. :-)
|
|I'm connected from an MSDOS PC to a 386 running UNIX via a pair of
|Trailblazer +s as I type.  I just tried Greg's suggestion of escaping and
|interrogating S70 and S72.  The results?  Instantaneous transmit rate:
|17374 bps.  Instantaneous receive rate: 16425 bp.
|
|We don' need no steenkin' Shannon!  ;-)


	You're both right - it's a dessert topping,
	AND a floor wax!

	The contents of the S70-2 registers are a measure
	of raw data throughput only (max. 18000 bps).

	The actual end-to-end data throughput is approx.
	20% less due to packetizing overhead, etc.

	The net result for async throughput is around
	1440 bytes/sec maximum.


-- 
  ,u,	 Bruce Becker	Toronto, Ontario
a /i/	 Internet: bdb@becker.UUCP, bruce@gpu.utcs.toronto.edu
 `\o\-e	 UUCP: ...!utai!mnetor!becker!bdb
 _< /_	 "A family is like a gun." - Hal Hartley
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References: <361@imp.UUCP> <PCG.91Aug11170926@aberdb.aber.ac.uk> <1991Aug15.234709.2532@mccc.edu>

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From: bdb@becker.UUCP (Bruce D. Becker)
Newsgroups: comp.mail.uucp,comp.dcom.modems,biz.comp.telebit
Subject: Re: why is Inbound so much Slower than Outbound?
Message-ID: <117145@becker.UUCP>
Date: 20 Aug 91 16:33:25 GMT
References: <361@imp.UUCP> <PCG.91Aug11170926@aberdb.aber.ac.uk> <1991Aug15.234709.2532@mccc.edu>
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