Universal Serial Bus Connectors - IBM xSeries 445 Type 8870 Option Installation Manual

Universal Serial Bus connectors

Your server has three Universal Serial Bus (USB) connectors, 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 attached
to the connector.
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 additional 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
connectors 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
The following illustration shows the pin-number assignments for the keyboard
connector 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.
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xSeries 445 Type 8870: Option Installation Guide
connectors and devices will be disabled during the power-on self-test
(POST).
1 4
6 5
4 3
1
2
5 1
15 11