VAX - MMJ DEC423 Pinout
Setting up serial connection to VAXstation 4000/60: First made a serial cable, attention Vax use a DEC423 serial port designed for long distant terminal line: --------------- 1 - DTR (Data terminal ready) I I 2 - TxD (Transmit data) I 1 2 3 4 5 6 I 3 - GND (Signal ground) I I 4 - RxC (Receive common) I I 5 - RxD (Receive data) ---------I____I 6 - DSR (Data set ready) Pin 2 of the phone connector goes to Rx pin of the serial (3 of DB25 or 2 of DB9), pins 3 & 4 go to ground (7 of DB25 or 5 of DB9), and pin 5 goes to Tx pin (2 of DB25 or 3 of DB9). ...