Serial Ports; Viewing Or Changing The Serial-Port Assignments; Serial-Port Connectors; Universal Serial Bus Ports - IBM eServer xSeries 255 Option Installation Manual

Serial ports

Your server has one standard serial port: serial port A. The operating system and
the ISMP cannot use or share serial port A.
Some application programs require specific ports, and some modems function
properly only at certain communication port addresses. You might need to use the
Configuration/Setup Utility program to change communication port address
assignments to prevent or resolve address conflicts.

Viewing or changing the serial-port assignments

To view or change the serial-port assignments:
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
5. Select Save Settings; then, select Exit Setup to exit from the

Serial-port connectors

The following illustration shows the pin-number assignments for the 9-pin, male
D-shell serial-port connector on the rear of your server. These pin-number
assignments conform to the industry standard.

Universal Serial Bus ports

Your server has four Universal Serial Bus (USB) ports, which are configured
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
2. If you install a USB keyboard that has a mouse port, the USB keyboard
3. Check to make sure that your NOS supports USB devices.
4. For additional information about USB devices, go to http://www.usb.org/.
Note: The Devices and I/O Ports choice appears only on the full configuration
menu. If you set two levels of passwords, you must type the
administrator password to access the full configuration menu.
settings.
Configuration/Setup Utility main menu.
1 5
6 9
USB ports and devices will be disabled during the power-on self-test (POST).
emulates a mouse, and you will not be able to disable the mouse settings in the
Configuration/Setup Utility program.
Chapter 3. Input/output ports and connectors
79