Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!sunybcs!boulder!bobk
From: bobk@boulder.Colorado.EDU (Bob Kinne)
Newsgroups: comp.unix.ultrix
Subject: Re: DECstations 3100 serial port pinout configuraion
Message-ID: <9793@boulder.Colorado.EDU>
Date: 30 Jun 89 19:48:30 GMT
References: <25929@agate.BERKELEY.EDU>
Sender: news@boulder.Colorado.EDU
Reply-To: bobk@boulder.Colorado.EDU (Bob Kinne)
Organization: University of Colorado, Boulder
Lines: 17

In article <25929@agate.BERKELEY.EDU> wilson@potassium.cchem.berkeley.edu (Michael A. wilson) writes:
>
>     Does anyone know the pinouts to adapt the RJ/11 (6 wire) serial port
>on the 3100 to a 9-pin RS232 ( or a 25-pin RS232 ) ?  We don't yet have

This is in the DECconnect System planning and config guide.
The MMJ has 
	1. RDY OUT
	2. Transmit +
	3. Transmit -
	4. Receive -
	5. Receive +
	6. RDY IN

To connect to RS232, jumper 3 and 4 together and connect to signal
ground (pin 7), connect 2 - 2, 5 - 3, 1 - 20 (DTR, pin 5 in 9 pin),
and 6 - 6 (DSR).  For null modem, cross the TX + and RX + leads.