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000100_kevinl01@earthlink.net_Thu May 26 17:00:44 2005.msg
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Path: newsmaster.cc.columbia.edu!panix!newsfeed.media.kyoto-u.ac.jp!newshub.sdsu.edu!elnk-nf2-pas!newsfeed.earthlink.net!stamper.news.pas.earthlink.net!stamper.news.atl.earthlink.net!newsread1.news.atl.earthlink.net.POSTED!15e436bc!not-for-mail
From: Kevin L <kevinl01@earthlink.net>
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Newsgroups: comp.protocols.kermit.misc
Subject: Kermit server requirements
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Date: Thu, 26 May 2005 04:01:48 GMT
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Xref: newsmaster.cc.columbia.edu comp.protocols.kermit.misc:15338
We have encountered a problem with an embedded device and I'm thinking Kermit
might have my best answer. The device itself is a Pentium 266MHz running
Windows 2000. The "control computer" that talks to it in a 486 100MHz running
Linux.
Short form is, the device supports ethernet (10 / 100 baseTX) but we can't get
enough cat-3 or cat-5 cabling between it and the control computer. It's an
underwater instrument, and the last two feet of waterproof pigtail is straight
wires, and this is apparently enough to kill the ethernet signalling. I think I
can solve this by re-wiring the 4 ethernet wires to run into a serial port
instead. We max at 115200 bps, though, and need to at least get some kind of
performance on our data transfers.
I'm considering two options with this serial port. The first is to run a PPP
server and pretend at the application layer that all is still ethernet. The
second is to run a Kermit server and issue host commands and file transfer commands.
I like the Kermit idea because I feel that it will enjoy a significant
performance gain for file transfers against FTP-via-PPP. The files I need to
transfer will be in the neighborhood of 4MB each, and I'm still not certain how
many I'll need to move every day. Coupled with unreliable 3-wire rs232 at
115200, I think the Kermit protocol will be the fastest thing available and I
can trust its crash recovery feature better than FTP's. The host commands I
need to send are rather trivial and the output of them can be parsed easily on
the control computer.
So, what do I need to run a Kermit server on Windows 2000? Do any of the free
versions do it? Can it be set to run as a service, and can I easily verify its
presence from the control computer? Does it restart itself on crashes, or is it
so reliable nowadays that I needn't ask the question?
Finally, is there any good reason I just stick to PPP?