IBM 6000R Hardware Maintenance Manual - Page 112

1 5 6 9 Pin Signal 1 Data carrier detect 2 Receive data 3 Transmit data 4 Data terminal ready 5 Signal ground Pin Signal 6 Data set ready 7 Request to send 8 Clear to send 9 Ring indicator Table 19. Serial-port connectors pin-number assignments Universal Serial Bus ports The server has two Universal Serial Bus (USB) ports, which configure automatically. USB is an emerging serial interface standard for telephony and multimedia devices. It uses Plug and Play technology to determine the type of device attached to the connector. Notes: 1. If you attach a standard (non-USB) keyboard to the keyboard connector, the USB ports and devices will be disabled during the power-on self-test (POST). 2. If you install a USB keyboard that has a mouse port, the USB keyboard emulates a mouse and you will not be able to disable the mouse settings in the Configuration/Setup Utility program. USB cables and hubs You need a 4-pin cable to connect devices to USB 1 or USB 2. If you plan to attach more than two 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 megabits-per-second (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 table shows the pin-number assignments for the USB-port connectors on the rear of the server. Pin Signal 1 VCC 2 -Data 3 +Data Table 20. USB-port connector pin-number assignments 100 Netfinity 6000R Type 8682 Models 1RY, 2RY