IBM 86645RY Hardware Maintenance Manual - Page 160

Table 8 on page 152 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 Table 8. Ethernet port pin-number assignments Pin Signal Pin Signal 1 Transmit data+ 2 Transmit data− 3 Receive data+ 4 Reserved 5 Reserved 6 Receive data− 7 Reserved 8 Reserved Universal serial bus ports: The system board in the Netfinity 5600 server contains two universal serial bus (USB) ports. Each USB port has an external connector on the rear of the server for attaching devices that previously used serial, parallel, keyboard, mouse, and game ports. USB is an emerging serial interface standard for telephony and multimedia devices. USB technology uses Plug and Play technology to determine what device is attached to the connector. Each USB device is accessed by a unique USB address. A device called a hub is used to convert the USB port into multiple attachment points. A hub has multiple ports where peripherals can be attached. USB provides 12 megabits-per-second (Mbps) bandwidth with a maximum of 63 peripherals and a maximum signal distance of five meters (16 ft.) per segment. Note If more than one USB device is to be attached, then the device must be connected to a hub. Table 9 shows the pin-number assignments for the USB connectors. Table 9. USB port pin-number assignments Pin Signal 1 VCC 2 −Data 3 +Data 4 Ground 152 Netfinity Server HMM