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Grex > Info > #157: Help on Zmodem Transfers... | |
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| Author |
Message |
zlee
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Help on Zmodem Transfers...
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Jul 2 19:02 UTC 1994 |
Hello, I was wondering if anybody had any problems dowloading with Zmodem
and got TIMEOUT problems during the transfer sessions? I always seem to
get them for some reason...Can anybody help?
Zivago
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| 32 responses total. |
popcorn
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response 1 of 32:
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Jul 2 19:09 UTC 1994 |
This response has been erased.
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robh
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response 2 of 32:
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Jul 2 19:37 UTC 1994 |
I only get those errors when telnetting in. I'll wager $5 that's
your problem.
Like popcorn said, try Kermit, or if you've got a uudecode program
on your micro, you can uuencode on this end and do a text transfer.
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zlee
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response 3 of 32:
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Jul 3 02:34 UTC 1994 |
No, no, no.... I meant after I FTPd the file to this system, then I would
go to the Other Menu, then Transfer Menu for a Zmodem download of the file
I FTPd. I would then get a real slow down and even TIMEOUT errors...
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robh
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response 4 of 32:
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Jul 3 02:57 UTC 1994 |
Zivago, that's exactly what we mean. Are you using a telnet
connection, as with the MSU Gopher, to connect to Grex?
If so, Z-Modem will not work. Try using Kermit instead.
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zlee
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response 5 of 32:
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Jul 3 14:01 UTC 1994 |
Ok, but there is no Kermit option in the Transfer menu....
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popcorn
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response 6 of 32:
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Jul 3 14:27 UTC 1994 |
This response has been erased.
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popcorn
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response 7 of 32:
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Jul 3 14:53 UTC 1994 |
This response has been erased.
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zlee
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response 8 of 32:
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Jul 5 18:17 UTC 1994 |
Ok,... I'll try it... and thanks! Hope it works...
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zlee
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response 9 of 32:
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Jul 6 00:48 UTC 1994 |
Ok, I tried it... but the Kermit is WAY slower than Zmodem...
I tried the Zmodem, and it works, actually... except that
TIMEOUT error comes out once in a while... I guess Grex is
really loaded up or something...
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srw
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response 10 of 32:
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Jul 6 02:54 UTC 1994 |
Kermits defaults for packet sizes are very small, resulting in horrible
performance. You can improve it enormously (though not to Z modem)
by using extended packets. The only hazard is if they are too long
they will overrun buffers and you'll get lots of timeouts.
If youe see that, cut back. That should help a lot.
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kentn
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response 11 of 32:
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Jul 6 03:00 UTC 1994 |
I think you can up the timeout interval for Zmodem if you find it's
timing out unnecessarily. Check the man page for sz/rz or better
yet, the documentation from Omen Technology.
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popcorn
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response 12 of 32:
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Jul 6 12:59 UTC 1994 |
This response has been erased.
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kentn
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response 13 of 32:
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Jul 6 14:00 UTC 1994 |
If the Kermit on your end supports extended packets (not all do).
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srw
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response 14 of 32:
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Jul 6 14:22 UTC 1994 |
The only one I have ever seen that did not was a really old Vax version.
There is a newer one which does.
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kentn
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response 15 of 32:
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Jul 6 20:01 UTC 1994 |
Well, let's see. My MsDOS comm program doesn't support Kermit
sliding windows or extended packets, though it does have a working
Kermit protocol. Ditto Apple Kermit-65 and CP/M Kermit-80. Ditto
MTS Kermit.
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popcorn
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response 16 of 32:
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Jul 7 04:22 UTC 1994 |
This response has been erased.
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srw
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response 17 of 32:
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Jul 7 04:54 UTC 1994 |
OK. I'm willing to believe that there isn't any new kermit for old OSes like
CP/M, the APple II and MTS, but for Dos, Windows, mac, Vac, Unix etc.,
there's no problem.
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kentn
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response 18 of 32:
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Jul 7 05:20 UTC 1994 |
You've just heard two examples of MS-DOS comm programs that don't
support the new Kermit features (Telemate in my case, and as popcorn
mentioned, Procomm). Telemate, at least, isn't "old". And being "old"
doesn't mean people aren't using that equipment or software...
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remmers
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response 19 of 32:
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Jul 7 09:26 UTC 1994 |
However, that doesn't mean that there's a problem with setting the
kermit default on Grex to do long packets and sliding windows. When a
kermit transfer is started, the kermits on both ends "negotiate", and
if Grex's kermit determines that the kermit on the other end doesn't
have those features, it drops back to doing things the "old-fashioned"
way -- the transfer should still succeed.
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popcorn
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response 20 of 32:
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Jul 7 11:12 UTC 1994 |
This response has been erased.
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srw
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response 21 of 32:
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Jul 7 13:35 UTC 1994 |
AH, kentn, you are describing programs that aren't Kermit but which do
kermit protocol (lamely). You misunderstood my response in #14 which was
talking about the Kermit program(s). I obviously misunderstood your #13
to be talking about Kermit (the program).
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kentn
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response 22 of 32:
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Jul 7 18:20 UTC 1994 |
Ah... Well, I assume people use all kinds of protocols...that may
be a part of other programs. MS-DOS Kermit 3.13 is a comm program *and*
the Kermit protocol for file transfers (an excellent program, btw).
Zmodem also is a part of other people's programs (and usually poorly
implemented, according to Chuck Forsberg). Fortunately, Zmodem can
be run as an external protocol by getting DSZ or GSZ.
It would be nice if I could do the same with Kermit.
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zlee
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response 23 of 32:
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Jul 7 19:01 UTC 1994 |
I agree with Kent... I wish Kermit can be run externally... now I must
always get out of my usual comm program... and run the Kermit comm...
Oh, BTW popcorn... could you give me your copy of Kermit... If it is
the latest version...
I have version 3.00 of MS Kermit...thanks... you could either uuencode it
or just send it to my directory or something...
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mju
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response 24 of 32:
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Jul 7 23:03 UTC 1994 |
Chuck Forsberg believes any protocol implementation which doesn't
give him royalties has something wrong with it. I've started
ignoring what he says, since his answer to most people's questions
about Zmodem is "buy my commercial software".
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