Appendix A - Specifications
107
Serial Port Specifications
Interface RS-232
Baud Rate (bps) 300,600,1200 2400,4800,9600 19200, 38400s
Protocol Hardware, XON/XOFF, None, Both
Parity Even/Odd/None
Data Bits 7 or 8
Stop Bits 1 or 2
Connector Male DB-9
Cable < 15 meters
Pin Purpose Direction
1Carrier Detect (CD) To server
2Receive (Rx) To server
3Transmit (Tx) To printer
4Data Terminal Ready To printer
5Signal Ground (GND) None
6Data Set Ready (DSR) To server
7Request to Send (RTS) To printer
8Clear to Send (CTS) To server
9Ring Indicator (RI) To server
Figure 46 Serial cable pinouts Apple LaserWriter