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Article #5306Re: why is Inbound so much Slower than Outbound?
From: Bruce D. Becker
Date: Tue, 20 Aug 1991 16:33
Date: Tue, 20 Aug 1991 16:33
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2252 bytes
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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arc1-ca.pugleaf.net!gmdzi!unido!fauern!math.fu-berlin.de!ox.com!caen!sdd.hp.com!cs.utexas.edu!utgpu!utzoo!censor!comspec!becker!bdbReferences:
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 10beba,1772269c9d4efe69,start X-Google-Attributes: gid10beba,public X-Google-Thread: fa2d8,1772269c9d4efe69,start X-Google-Attributes: gidfa2d8,public X-Google-Thread: 10d3b3,b5856ca1a75bf065 X-Google-Attributes: gid10d3b3,public X-Google-ArrivalTime: 1991-08-20 23:50:28 PST Path: arc1-ca.pugleaf.net!gmdzi!unido!fauern!math.fu-berlin.de!ox.com!caen!sdd.hp.com!cs.utexas.edu!utgpu!utzoo!censor!comspec!becker!bdb 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> Followup-To: comp.mail.uucp Organization: G. T. S., Toronto, Ontario, Canada Lines: 35