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000335_satprof@altavista.com_Wed Jan 30 12:09:02 EST 2002.msg
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Article: 13173 of comp.protocols.kermit.misc
Path: newsmaster.cc.columbia.edu!panix!bloom-beacon.mit.edu!newsfeed.stanford.edu!postnews1.google.com!not-for-mail
From: satprof@altavista.com (satprof)
Newsgroups: comp.protocols.kermit.misc
Subject: Re: Evaluation of K95
Date: 30 Jan 2002 08:52:31 -0800
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Xref: newsmaster.cc.columbia.edu comp.protocols.kermit.misc:13173
OK, Frank, I've sent my order in & hope to receive my copies RSN.
(I've paid for Fedex superfast to Europe.) For the future, a download
capability, after payment, would be really nice, so that I could get
on with my testing more or less immediately.
As it happens, I'm a Kermit fan of old. A colleague when I worked in
Holland contributed the Ungermann-Bass 'comms via network' code in the
late 80s, that used something like INT 65H, IIRC. I even managed to
buy the Digital Press 'Using Kermit' book from DEC here in
Switzerland.
More power to your elbow, say I, & I'm happy to pay your very
reasonable price. My original question was primarily one of fast
availability & I'll just have to be patient & wait for the Fedex guy.
Satprof (WHO, Geneva)
fdc@columbia.edu (Frank da Cruz) wrote in message news:<a367rk$m5s$1@watsol.cc.columbia.edu>...
> In article <gWtomC2dEjRt-pn2-s9d6MMWmKCzf@era0>,
> ERA <era@eracc.hypermart.net> wrote:
> : On Mon, 28 Jan 2002 13:13:54 UTC, satprof@altavista.com
> : (satprof) wrote:
> :
> Thanks for the ringing endorsement, Gene.
>
> : + My requirement is for a solid & reliable overnight transfer of
> : ^^^^^ ^ ^^^^^^^^
> : You're talking kermit products from Columbia U. there definitely.
> :
> : + about 70MB via double satellite links (~ 300kbps)...
> :
> 70MB / 30Kcps = 39 minutes...
>
> : ...with the
> : + possibility of data validation & restarts. Has anyone here any
> : + experience with such a set-up?
> :
> : Not with satellite links.
> :
> Of course Kermit works nicely with satellite links too, because of its
> sliding windows with selective repeat transport, but some first-hand
> independent testimony would be appreciated. Meanwhile, however, you might
> want to look at the following article from 1990:
>
> http://www.columbia.edu/kermit/newsn4.html#eff
>
> Towards the end are some benchmarks performed over a satellite link.
> Speeds are higher these days but the issues are the same. Kermit sliding
> windows let you get pretty much full speed out of satellite links, whereas
> stop-and-wait or streaming protocols are either orders of magnitude slower,
> or else have intolerable error recovery characteristics.
>
> - Frank