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From: etxsral@california.ericsson.se (Lars Nilsson)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: null modem cable
Message-ID: <1991Jan27.123115.23732@ericsson.se>
Date: 27 Jan 91 12:31:15 GMT
References: <2582@s5.Morgan.COM> <8Fy4V2w163w@cybrspc> <3439@nosc.NOSC.MIL>
Sender: news@ericsson.se
Organization: Ericsson Telecom, Stockholm, Sweden
Lines: 41

In article <3439@nosc.NOSC.MIL> koziarz@halibut.nosc.mil (Walter A. Koziarz) writes:
>>Here's a design that emulates a LapLink cable. I've used it with great
>
>It's never a good move to try to 'fake-out' hardware handshaking!!!!!  Don't do
>it!!  Presented below is *the RIGHT way* to make a null modem cable --
>
>[1]------chassis GND--------[1]
>
>[2]-------------------------[3]
>
>[3]-------------------------[2]
>
>[4]-------------------------[5]
>
>[5]-------------------------[4]
>
>[6]------------------------[20]
>
>[7]-----signal GND----------[7]
>
>[8]-------------------------[8]
>
>[20]------------------------[6] 
>
>
>This is the correct wat to make a FULL-HANDSHAKING null modem; throw away
>ANYTHING that tells you to use the 'other', fake-out connection.
>
>Walt K.

Uhmm.  Your solution seems good except for the pin 8 to pin 8 connection
,connecting an input to an input doesnt work so good.
I usually connect pin 8 -- 6 to 20 in the other end.

/Lars Nilsson

--
Lars Nilsson        
Ericsson Telecom AB , Stockholm - Sweden
E-mail: etxsral@california.ericsson.se
Fidonet: Lars Nilsson @ 2:201/108.7