Usb Cables And Hubs; Usb-Port Connectors; Gigabit Ethernet Port; Configuring The Gigabit Ethernet Controller - IBM eServer xSeries 255 Option Installation Manual

USB cables and hubs

You need a 4-pin cable to connect devices to USB 1, or USB 2, USB3, or USB4. If
you plan to attach more than four 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 five meters (16 ft) per segment.

USB-port connectors

Each USB port has an external connector on the rear of the server for attaching
USB compatible devices.
The following illustration shows the pin-number assignments for the USB ports on
the rear of your server.

Gigabit Ethernet port

Your server comes with an integrated Gigabit Ethernet controller. This controller
provides an interface for connecting to 10-Mbps, 100-Mbps, or 1000-Mbps networks
and provides full-duplex (FDX) capability, which enables simultaneous transmission
and reception of data on the Ethernet local area network (LAN).
The integrated Ethernet controller is located on PCI bus B (slots 2 and 3) on the
system board. See "Adapter considerations" on page 18 for detailed information
about the PCI buses in your server.
To access the Ethernet port, connect a Category 3, 4, or 5 unshielded twisted-pair
(UTP) cable to the RJ-45 connector on the rear of your server.
Note: The 100BASE-TX/1000BASE-T Fast Ethernet standard requires that the
The Ethernet (RJ-45) connector has two LEDs. The Ethernet link LED is on the
right. When this green LED is on, there is an active connection on the Ethernet
port. The Ethernet activity LED is on the left. When this amber LED is on, there is
activity between the server and the network. These LEDs have the same functions
as the Ethernet link LED and the Ethernet activity LED on the rear of the server
(see the User's Guide on the IBM xSeries Documentation CD for information about
the Configuration/Setup Utility program).

Configuring the Gigabit Ethernet controller

The Ethernet controller is integrated on the system board. This controller provides
an interface for connecting to 10-Mbps, 100-Mbps, or 1000-Mbps networks and
provides full duplex (FDX) capability, which enables simultaneous transmission and
reception of data on the Ethernet local area network (LAN). You do not need to set
any jumpers or configure the controller for your operating system before you use
the Ethernet controller. However, you must install a device driver to enable your
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cabling in the network be Category 5 or higher.