IBM 86655RY - Netfinity 7600 - 8665, Руководство по техническому обслуживанию аппаратной части, Страница: 98 / 294

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Hardware Maintenance Manual: Netfinity 7600 – Type 8665 Models 1RY, 2RY
4. Select the serial port; then, use the arrow keys to advance through the settings
available.
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 rear of the server. These pin-number assignments
conform to the industry standard.
Universal Serial Bus ports
The server has two Universal Serial Bus (USB) ports that configure automatically.
USB is an emerging serial interface standard for telephony and multimedia devices. It
uses Plug and Play technology to determine the type of device 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.
3.Check to make sure your NOS supports USB devices.
USB cables and hubs
You need a 4-pin cable to connect devices to USB 1 or USB 2. If you plan to attach
more than two USB devices to the machine, you must use a hub to connect the
devices. The hub provides multiple connectors for attaching additional external USB
devices with a maximum of 127 external devices.
USB technology provides up to 12 megabits-per-second (Mbps) speed with a
maximum of 127 external devices and a maximum signal distance of five meters (16
ft.) per segment.
Table 15. 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
1
5
6 9