wilson@helium.cchem.berkeley.edu (Michael A. Wilson) (06/30/89)
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
the technical specs for our machines.
Thanks,
Mike Wilsonbobk@boulder.Colorado.EDU (Bob Kinne) (07/01/89)
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.
ecf_hap@jhunix.HCF.JHU.EDU (Andrew Poling) (08/09/89)
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 >the technical specs for our machines. If it's DECconnect (the clip is offset to one side) then it looks like this inside: RS 232 Specs for DECconnect MMJ DTR--- 1 TD --- 2 GRD--- 3 GRD--- 4 RD --- 5 DSR--- 6 Obviously, if it's not DECconnect you should ignore this. Note that flipping the cable over in the MMJ causes a DTE/DCE flip - clever. -Andy -- Andy Poling andy@gollum.hcf.jhu.edu Network Services Group ecf_hap@jhunix.UUCP Homewood Academic Computing ECF_HAP@JHUVMS.BITNET Johns Hopkins University