IBM 8479 User Reference - Page 74

Universal Serial Bus connectors Your server has two 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 that is attached to the connector. Notes: 1. If you attach a standard (non-USB) keyboard to the keyboard connector, the USB connectors and devices will be disabled during the power-on self-test. 2. If you install a USB keyboard that has a mouse connector, the USB keyboard emulates a mouse, and you will not be able to disable the mouse settings in the Configuration/Setup Utility program. 3. Some operating systems do not support USB devices. Refer to your operatingsystem documentation to determine whether your operating system supports USB devices. USB cables and hubs You need a 4-pin cable to connect devices to a USB 1 or USB 2. If you plan to attach more than two USB devices, you must use a hub to connect the devices. The hub provides multiple connectors for attaching additional external USB devices. USB technology transfers data at up to 12 MBps with a maximum of 127 external devices and a maximum signal distance of five meters (16 ft) per segment. USB connectors There are two USB connectors located on the rear of the server for attaching USBcompatible devices. See "I/O connector locations" on page 51 for the location of the USB connectors. The following table shows the pin-number assignments for the USB connectors. 1 4 Table 7. USB connector pin-number assignments. Pin 1 2 3 4 +5 V -Data +Data Ground Signal Audio connectors The audio connectors are used to connect external audio equipment to your server. See "I/O connector locations" on page 51 for the location of these connectors. Line Line Mic out in 60 IBM xSeries 200: User's Reference