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Article #11556

Re: pins for null modem ??? help..

#11556
From: Adrian Buss Sys-Op
Date: Wed, 14 Oct 1992 03:13
45 lines
1951 bytes
In article <Bw0MoI.AMB@gpu.utcs.utoronto.ca> darek@gpu.utcs.utoronto.ca (Darek Dabrowski) writes:
>I need the pins that are used for null modem cable. (serial port..)
>
>
>	there are 25 pins which should be connected and how ???
>
>	1 . . . . 5 . . . . 1 . . . . 5 . . . . 2 . . . . 5
>
>
>	1 . . . . 5 . . . . 1 . . . . 5 . . . . 2 . . . . 5
>
>I know that pin 3 should be connected to 4 and 6 & 8 to 20 but 
>this doesn't work... I want to connect XT with 486 could this be a problem ??


I dunno but this is the way I think it is supposed to be for a proper null
modem cable with out disabling your rts and cts and all them goodies :)


2 goes to the other 3
3 goes to the other 2
4 goes to the other 5
5 goes to the other 4
7 goes to the other 7
8 goes to the other 20
20 goes to the other 7

This one should work but it is not guarranted to work for a sure thing
but you lose the auto hang up and things you can try....

2 goes to the other 3
3 goes to the other 2
4 jumpered to 5 on  both sides  (as in on the same end of the cable)
6 jumpered to 8 jumpered to 20 also on both sides
7 goes to the other 7 

and well if these dont work give up like I do and call someone *grin*



-- 
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Technical Details
Message-ID: <1992Oct14.031303.2815@r-node.gts.org>
Path: arc1-ca.pugleaf.net!sparky!uunet!uunet.ca!geac!r-node!ziggy
References: <Bw0MoI.AMB@gpu.utcs.utoronto.ca>

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Newsgroups: sci.electronics
Path: arc1-ca.pugleaf.net!sparky!uunet!uunet.ca!geac!r-node!ziggy
From: ziggy@r-node.gts.org (Adrian Buss  Sys-Op)
Subject: Re: pins for null modem ??? help..
Message-ID: <1992Oct14.031303.2815@r-node.gts.org>
Organization: R-node Public Access UNIX Information System (416-249-5366)
References: <Bw0MoI.AMB@gpu.utcs.utoronto.ca>
Distribution: ont
Date: Wed, 14 Oct 1992 03:13:03 GMT
Lines: 45