IBM 86807RY Hardware Maintenance Manual - Page 115

Universal Serial Bus Ports: The I/O board in your Netfinity 7000 M10 contains two universal serial bus (USB) ports. Each USB port has an external connector on the rear on 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 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 devices can be attached. USB provides 12 megabits-per-second (Mbps) data transfer rate with a maximum of 63 devices and a maximum signal distance of 5 meters (16 ft.) per data segment. Note If more than one USB device is to be attached, the device must be connected to a hub. Table 6 shows the pin-number assignments for the USB connectors. Table 6. USB Connector Pin-Number Assignments Pin Signal 1 VCC 2 −Data 3 +Data 4 Ground 10/100 Ethernet Port: The Advanced Remote Management Controller contains a 10/100 Ethernet controller. The Ethernet controller has an external RJ-45 connector that is used with category 3, 4, or 5 unshielded twisted-pair (UTP) cable. The connector enables your Advanced Remote Management Controller to attach to an Ethernet network for remote communication. Notes 1. The 10/100 Ethernet port cannot be accessed from the network operating system. The connector is dedicated to connecting your Advanced Remote Management Controller to an Ethernet network through a service-processor interface, such as Netfinity Manager. 2. The 100BASE-TX Fast Ethernet standard requires that the cabling in the network is Category 5 or higher. Table 7 on page 108 shows the pin-number assignments for the RJ-45 connector. These assignments apply to both 10BASE-T and 100BASE-TX devices. Netfinity 7000-M10 - Type 8680 107