IBM xSeries 440 8687, Option Installation Manual

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xSeries 440:Option Installation Guide
Universal Serial Bus ports
Your server has three Universal Serial Bus (USB) ports, which are configured auto-
matically. USB is a serial interface standard for telephony and multimedia devices. It
uses Plug and Play technology to determine the type of device attached to the con-
nector.
USB cables and hubs:
You need a 4-pin cable to connect devices to USB 1,
USB 2, and USB 3. If you plan to attach more than three USB devices, you must use a
hub to connect the devices. The hub provides multiple connectors for attaching addi-
tional external USB devices.
USB technology provides up to 12 Mbps speed with a maximum of 127 external
devices and a maximum signal distance of 5 meters (16 ft) per segment.
USB-port connectors:
There are two USB-port connectors on the rear of the
server and one USB-port connector on the front. These USB-port connectors are
used to attach USB compatible devices to the server.
The following illustration shows the pin-number assignments for the USB-port connec-
tors on your server.
Keyboard connector
There is one keyboard connector on the rear of the server.
Note: If you attach a standard keyboard to the keyboard connector, the USB ports
and devices will be disabled during the power-on self-test (POST).
The following illustration shows the pin-number assignments for the keyboard connec-
tor on the end of the cable.
Video connector
The following illustration shows the pin-number assignments for the 15-pin analog
video connector on the rear of the server.
1 4
6
4
2
1
3
5
1
5
11 15