serial port wiring for unix-pc
Pete Holsberg
pjh at mccc.UUCP
Tue Sep 6 11:33:44 AEST 1988
In article <1639 at ddsw1.UUCP> jlg at ddsw1.UUCP (JL Gomez) writes:
...I have a question concering the wiring scheme for DTE to DTE connection.
...I am using a RJ-11 - DB25 adaptor. The problem is that there are only
...4 wires available to connect. I do know I need pins 2 & 3 crossed and
...pin 7 is a straight thru. Now, what do I do with the extra wire and
...would I have to short any pins on the serial port end of the unix-pc?
...Thanks for the info.
...--
...JL Gomez
Some questions...What is the other DTE? Does it have but 4 wires? What
is the "extra" one?
The UNIX PC crosses 2 and 3, and connects 7 straight through as you have
said. It expects 4 and 5 shorted, and 6, 8, and 20 shorted. Note that
no control is passed across the interface with this connection.
Pete Holsberg UUCP: {...!rutgers!}princeton!mccc!pjh
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