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From: j@uriah.heep.sax.de (J Wunsch)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: Setting up a terminal using a null modem cable
Date: 3 Aug 1996 20:18:07 GMT
Organization: Private BSD site, Dresden
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Message-ID: <4u0c5v$qnk@uriah.heep.sax.de>
References: <31FFD39F.2437@ctcc.gov.za>
Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch)
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Andr=?iso-8859-1?Q?=E9?= Coetzee <acoetzee@ctcc.gov.za> wrote:
> The Null cable works fine between the two machines in both directions
> under DOS!
Most likely, the null modem cable doesn't emulate carrier. Unix
serial ports by default (i.e., unless declared ``local'') only work if
carrier is present.
My usual null modem cables look like these:
2 --\/-- 2
3 --/\-- 3
4 --\/-- 4
5 --/\-- 5
6 -+ +- 6
7 -|--|- 7
8 -*\/*- 8
20 --/\-- 20
This way, carrier (DCD, pin 8) is emulated by the remote DTR signal.
Alternatively, tweak your port to be `local' in /etc/rc.serial.
--
cheers, J"org
joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)