GoTo Connector

Apple LaserWriter Serial

25 PIN D-SUB CONNECTOR

Pin Name Dir Description
1 GND --- Ground
2 TXD- --> Transmit Data
3 RXD- <-- Receive Data
4 RTS --> Request To Send
5 CTS <-- Clear To Send
6 DSR <-- Data Set Ready
7 GND --- Ground
8 DCD --> Data Carrier Detect
20 DTR- --> Data Terminal Ready
22 RING <-- ?

Note: Direction is Printer relative Computer.