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000306_news@newsmaster….columbia.edu _Fri Nov 21 03:54:16 1997.msg
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From: Roy Buzdor <first.amendment@supremecourt.gov>
Newsgroups: comp.protocols.kermit.misc
Subject: Re: One-way null-modem cable?
Date: Thu, 20 Nov 1997 13:56:19 -0800
Organization: EDS Lansing Fab
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Jeffrey Hurwit wrote:
>
> Characters typed on the desktop machine
> appeared on the notebook's screen, but not visa
> versa. A test file transfer showed the same
> results: The notebook received the init packets
> from the desktop, but the desktop didn't receive
> ACKs/NAKs from the notebook.
I have done a bit of RS-232 debugging...the steps
that I would try would be:
1) On the desk-top, connect pin 2 to pin 3 and
see if the characters will echo on the
screen. (I have used a bent paperclip
for this more than once, but I would
recommend a properly wired connector.)
2) Try a different terminal emulator to see if
there is a conflict with the port. (Is
it possible that another process has
control of the port on the desk-top?)
3) Try connecting the note-book to a different
computer to see if that would work.
4) If the cable was not and "off the shelf"
purchase, check the pin connections.
Make sure that they go to the correct
pins.
> Suggestions?
It sounds like either (1) the port is bad, (2) the
wire is bad, (3) handshaking is preventing the data
from being transmitted, or (4) something else has
control of the port, and is not allowing Kermit
to operate properly.
--
Buz (:
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