Kreisen 3 8 6 X / X E - Manual (Page 159)

Serial Port - J1 and J4
Connector Jl and J4 provide the standard AT-type RS-232C
serial interfaces.
Note
you can use the on board serial ports for COM 1 and COM
2. If you have external card for serial ports on your system,
you must disable the on-board serial port. when you’d like
to disable the on board serial ports, do the following;
1. Open the hardware jumper, JP3 and JP4.
2. Enter the Extended Setup Program and disable the
serial ports.
Refer to Chapter 2 for the detailed descriptions of Extended
Setup Program.
Parallel Port - J2
Connector J2 on the system board provides a standard
Centronics 25pin parallel interface.
Note
If you want to use external device for parallel port, you
should disable the on-board parallel ports. Like the case of
serial ports, do the following for disable the parallel ports.
For more instruction of Extended Setup Program, see
Chapter 2 in this manual.
1. Open the hardware jumper, JP2.
2. Enter the Extended Setup Program and disable the
serial ports.
B-6 System MotherBoard