Date: Fri, 18 Jun 1999 01:21:43 -0500 (CDT) From: Don Read <dread@calcasieu.com> To: Andrew Johns <ajohns@TurnAround.com.au> Cc: FreeBSD Questions <freebsd-questions@FreeBSD.ORG>, cjclark@home.com Subject: RE: Null-Modem? Message-ID: <XFMail.990618012143.dread@calcasieu.com> In-Reply-To: <000f01beb948$1a080670$4001a8c0@tasajohns.turnaround.com.au>
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On 18-Jun-99 Andrew Johns wrote:
> A null-modem cable is a cable with the correct wires crossed/joined -
> typically if all you want is software flow control (not the best but it
> works) just connect pins 2,3 and 7 in a DB25 serial port connector (aka
> V35 connector) and swap pins 2 and 3 at one end. Pin 2 is transmit, 3
> receive, 7 ground; so you've got:
>
> One end: Other end:
>
> TX 2 --------\/------------- 3 RX
> RX 3 --------/\------------- 2 TX
> Gr 7 ----------------------- 7 Ground
>
if your terminals pay attention to the control signals then add:
RTS 4 -- -- 4
| |
CTS 5 -- -- 5
DSR 6 -- -- 6
| |
CD 8 -- -- 8
| |
DTR 20 -- -- 20
Regards,
---
Don Read dread@calcasieu.com
EDP Manager dread@texas.net
Calcasieu Lumber Co. Austin TX
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