Lexmark X644e User Guide

These instructions are for connecting the printer to an IBM-compatible 
personal computer using a dual asynchronous adapter or an external print 
server.

If you are using any of the above products, or if your computer has a 9-pin D shell 
connector that conforms to the IBM designed 9-pin serial port, use a 9-pin to 25-pin 
cable, such as IBM Part Number 6450242 (254 mm or 10 in.).

Null modem cables, such as Lexmark part number 1038693 [15.24 m (50 ft)], will 
connect the converter cable to the printer. The illustration below represents the 25-pin 
connectors for the RS-232C cable (1038693).

The following illustration shows the pin assignments for the 9-pin to 25-pin IBM EIA 
RS-232C serial cables. 

25

13

14

1

9 to 25 Pin Cable Adapter,

Lexmark 1038693 (50 ft)

9 (F)

25 (M)

25 (M)

25 (F)

Shield

Shield

such as IBM 6450242 (10 in.)