Xerox Phaser Printer EX7750 - Manual (Page 104)

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A-4 Color Measurement Instruments
4. Attach the connector to the computer.
For a Windows computer, insert the 8-pin mini-DIN end of the interface cable into
the 9-pin DB9 Connector cable adapter. Insert the 9-pin end into the COM1 or
COM2 port on the computer and tighten the screws. If the available port on your
computer is 25-pin, you must use the 8-pin-to-25-pin adapter.
For a Mac OS computer, connect the 8-pin mini-DIN plug directly into the serial port
of the computer.
Square connector Unused connector
Connect to computer
Interface cable
Connect to adapter
Unused connector
Connect to serial port