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
1
Carrier Detect (CD)
To server
2
Receive (Rx)
To server
3
Transmit (Tx)
To printer
4
Data Terminal Ready
To printer
5
Signal Ground (GND)
None
6
Data Set Ready (DSR)
To server
7
Request to Send (RTS)
To printer
8
Clear to Send (CTS)
To server
9
Ring Indicator (RI)
To server
Figure 46 Serial cable pinouts Apple LaserWriter