IBM 8646 Hardware Maintenance Manual - Page 77

Serial ports, Viewing or changing the serial-port assignments, Serial-port connectors

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Table 10. Parallel-port connector pin-number assignments (continued) 24 - Ground Ground 25 - Ground Ground Serial ports The server has two standard serial (communication) ports: serial port A and serial port B. 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 Table 11. Serial-port connectors pin-number assignments Pin Signal Pin 1 Data carrier detect 6 2 Receive data 7 3 Transmit data 8 4 Data terminal ready 9 5 Signal ground Signal Data set ready Request to send Clear to send Ring indicator 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). Installing options 69

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Table 10. Parallel-port connector pin-number assignments (continued)
24
-
Ground
Ground
25
-
Ground
Ground
Serial ports
The server has two standard serial (communication) ports: serial port A and serial
port B.
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
Table 11. Serial-port connectors pin-number assignments
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
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).
Installing options
69