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Technical Notes
A-8
Phaser 300X Color Printer
Serial port signals
The following table shows the printer’s serial port pinout.
Serial port signal descriptions
Signal name Pin # Printer I/O Description
DCD 1 In Data carrier detect
RxData 2 In Received data
TxData 3 Out Transmitted data
DTR 4 Out Data terminal ready
Gnd 5 Signal ground
DSR 6 In Data set ready
RTS 7 Out Request to send
CTS 8 In Clear to send
RI 9 Out Ring indicator