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Article #56972

Re: Terminals on a serial line

#56972
From: Christopher Biggs
Date: Tue, 19 Nov 1996 00:00
46 lines
2347 bytes
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hgriggs@mpx.com.au (Henry Griggs) moved upon the face of the 'Net and spake thusly:

> Sorry folks, but I solved my problem. I was using a simplistic
> null-modem with only three pins connected: 2-3, 3-2, 7-7. I replaced
> it with a full store-bought one that connects all the pins, and hey
> presto, it all works. I'm currently logged on via laptop on COM3,
> dialling out to my ISP via COM4. It works great. 

You didn't have to do that.   The problem is that login waits for DCD
to go high.   A full nullmodem will either run DTR from the terminal
to DCD at the computer, or loop DTR on the computer back to DCD on the
computer.   

You can tell the SOFTWARE to ignore DCD by setting the CLOCAL flag in
the terminal driver.

edit the file /etc/gettydefs and add the word CLOCAL to the flags in
the second and third sections of the line corresponding to your
terminal.   In fact, my copy of gettydefs contains a comment telling
you to do this.    Also, it is definitely mentioned in the
linux HOWTO document concerning serial ports and terminals.   

Check /usr/doc/faq for the HOWTO documents (if you installed them),
otherwise look here: http://www.ssc.com/linux/howto.html

Chris.

- --
Christopher Biggs -- chris@stallion.oz.au - Ph+61-7-3270-4266 - PGP & MIME OK
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Message-ID: <saralrvvki.fsf@gweepery.stallion.oz.au>
Path: arc1-ca.pugleaf.net!unknown!not-for-mail
References: <56hkai$vdg@inferno.mpx.com.au>

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From: Christopher Biggs <chris@stallion.oz.au>
Subject: Re: Terminals on a serial line
Date: 1996/11/19
Message-ID: <saralrvvki.fsf@gweepery.stallion.oz.au>
X-Deja-AN: 197586582
sender: chris@gweepery.stallion.oz.au
references: <56hkai$vdg@inferno.mpx.com.au>
organization: Stallion Technologies, Brisbane, Australia
newsgroups: aus.computers.linux