Some application programs require specific ports, and some modems function properly only at certain serial port addresses. You might need to use the Configuration/Setup Utility program to change serial port address assignments to prevent or resolve address conflicts.

Viewing or changing the serial-port assignments

To view or change the serial-port assignments, do the following:

1.Restart the server and watch the monitor screen.

2.When the message Press F1 for Configuration/Setup appears, press F1.

3.From the main menu, select Devices and I/O Ports; then, press Enter.

4.Select the serial port; then, use the arrow keys to advance through the available settings.

5.Select Save Settings; then, select Exit Setup to exit from the Configuration/Setup Utility main menu.

Serial-port connectors

The following table shows the pin-number assignments for the 9-pin, male D-shell serial-port connectors on the system board. These pin-number assignments conform to the industry standard.

 

1

5

 

 

6

9

 

Pin

Signal

Pin

Signal

1

Data carrier detect

6

Data set ready

2

Receive data

7

Request to send

3

Transmit data

8

Clear to send

4

Data terminal ready

9

Ring indicator

5

Signal ground

 

 

Table 10. Serial-port connectors pin-number assignments.

Universal Serial Bus ports

The server has two Universal Serial Bus (USB) ports, which configure automatically. USB is a serial interface standard for telephony and multimedia devices. It uses Plug and Play technology to determine the type of device that is attached to the connector.

Notes:

1.If you attach a standard (non-USB) keyboard to the keyboard connector, the USB ports and devices will be disabled during the power-on self-test (POST).

2.If you install a USB keyboard that has a mouse port, the USB keyboard emulates a mouse, and you will not be able to disable the mouse settings in the Configuration/Setup Utility program.

88Hardware Maintenance Manual: xSeries 220

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IBM XSERIES 220 manual Universal Serial Bus ports, Pin Signal