IBM 847671U Hardware Maintenance Manual - Page 167
Ethernet connector, controller, Table 11. Ethernet Connector Pin-Number Assignments
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Ethernet connector: The system board in the Netfinity 3000 server contains an Ethernet controller. The controller has an external RJ-45 connector on the rear of the server that is used with a Category 5 twisted-pair cable. Through this connector, you can attach an Ethernet network cable to the internal transceiver in the server. Attention: The 10BASE-T Ethernet and the 100BASE-TX Fast Ethernet cabling in the network must be Category 5 or higher to meet various standards, including electromagnetic compatibility. See "Configuring the Ethernet controller" on page 38 for additional information about the Ethernet controller. Table 11 shows the pin-number assignments for the RJ-45 connector. These assignments apply to both 10BASE-T and 100BASE-TX devices. 10BASE-T or 100 BASE-TX UTP Cable 1 23 Pins 6 RJ-45 Modular Plug Connector Pin Signal Pin Signal 1 Transmit data+ 5 Reserved 2 Transmit data− 6 Receive data− 3 Receive data+ 7 Reserved 4 Reserved 8 Reserved Table 11. Ethernet Connector Pin-Number Assignments IBM Netfinity 3000 - Type 8476 159