IBM 867431X Hardware Maintenance Manual - Page 106
USB-port connectors, Ethernet ports, Configuring the Ethernet controllers
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USB-port connectors: Each USB port has an external connector on the rear of the computer for attaching USB compatible devices. The following table shows the pin-number assignments for the USB-port connectors on the rear of your computer. Table 16. USB-port connector pin-number assignments Pin Signal 1 VCC 2 -Data 3 +Data 4 Ground Ethernet ports Your computer comes with two integrated Ethernet controllers. These controllers provide an interface for connecting to 10-Mbps or 100-Mbps networks and provide full-duplex (FDX) capability, which enables simultaneous transmission and reception of data on the Ethernet local area network (LAN). To access the Ethernet ports, connect a Category 3, 4 or 5 unshielded twisted-pair (UTP) cable to the RJ-45 connector on the rear of your computer. Note: The 100BASE-TX Fast Ethernet standard requires that the cabling in the network be Category 5 or higher. Configuring the Ethernet controllers: When you connect your computer to the network, the Ethernet controllers automatically detect the data-transfer rate (10 Mbps or 100 Mbps) on the network and then set the controllers to operate at the appropriate rate. In addition, if the Ethernet ports that your computer is connected to support auto-negotiation, the Ethernet controllers set the appropriate duplex state. That is, the Ethernet controllers adjust to the network data rate, whether the data rate is standard Ethernet (10BASE-T), Fast Ethernet (100BASE-TX), half duplex (HDX), or full duplex (FDX). The controllers support half-duplex (HDX) and full-duplex (FDX) modes at both speeds. The Ethernet controllers are PCI Plug and Play devices. You do not need to set any jumpers or configure the controllers for your operating system before you use the Ethernet controllers. However, you must install a device driver to enable the operating system to address the Ethernet controllers. Failover for redundant Ethernet: When you connect your server to the network, the Ethernet controllers automatically detect the data transfer rate (10 Mbps) or or 100 Mbps) on the network and then set the controllers to operate at the appropriate rate. The IBM 10/100 Ethernet Adapter or the IBM 10/100 EtherJet PCI family of adapters are optional redundant network adapters that you can install in your server. You can configure either one of the integrated Ethernet controllers or the Network adapter as the primary Ethernet controller. In failover mode, if the primary Ethernet controller detects a link failure, all Ethernet traffic associated with it is switched to the redundant (secondary) controller. This switching occurs without any user intervention. When the primary link is restored to an operational state, the Ethernet traffic switches back to the primary Ethernet controller. 98 Hardware Maintenance Manual: xSeries 330 Type 8674, IntelliStation R Pro Type 6851, and Network Equipment Building System Type 8674