Cingular X-C 6250 Pro (300) User Manual

X-C 6250 Pro (300) NT Users Manual

79-0030-001 11 January 2001

Setting the COM4 IRQs

Some modem software will not work with standard communication

(COM) port and Interrupt Request (IRQ) settings. Follow these

guidelines for the mobile computer:
COM Port

IRQ Setting

Change to

Used for

COM4

IRQ 3

IRQ 10

GSM, Cingular,

Motient, CDPD

The IRQ must be set the same in Windows NT and in the SCU. Follow

the procedures below.

To view or change the IRQ settings in the SCU

1 From the Start Menu, select Shut Down and then choose Restart

the computer.

2 Read the text on the screen while the computer is restarting, and

press

CTRL+ALT+S

as soon as the following line appears:

<CTRL+ALT+S> to enter System Configuration Utility.

3 Select Components by pressing

ALT+C

4 Select COM Ports.
5 Press

TAB

to move to COM4 settings.

6 Use the

and

DOWN ARROW

keys to switch between IRQ values,

and then press the

SPACEBAR

on the desired setting.

7 Choose OK to save the settings.

To view the Windows NT 4.0 IRQ settings

1 From the Start Menu, select Programs, Administrative Tools, and

then choose NT Diagnostics.

2 Choose the Resources tab, then Devices, then select Serial.
NOTE Windows NT moves COM4 to COM3 after boot-up. Therefore,

even though the SCU settings are for COM4, Windows NT sees and

uses this port as COM3.