IBM 86655RY Hardware Maintenance Manual - Page 98

4. Select the serial port; then, use the arrow keys to advance through the settings available. 5. Select Save Settings; then, select Exit Setup to exit from the Configuration/Setup Utility main menu. Serial-port connectors The following table shows the pin-number assignments for the 9-pin, male D-shell serial-port connectors on the rear of the server. These pin-number assignments conform to the industry standard. 1 5 6 9 Table 15. Serial-port connectors pin-number assignments. Pin Signal Pin 1 Data carrier detect 6 2 Receive data 7 3 Transmit data 8 4 Data terminal ready 9 5 Signal ground Signal Data set ready Request to send Clear to send Ring indicator Universal Serial Bus ports The server has two Universal Serial Bus (USB) ports that 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. 3.Check to make sure your NOS supports USB devices. 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 to the machine, you must use a hub to connect the devices. The hub provides multiple connectors for attaching additional external USB devices with a maximum of 127 external 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. 88 Hardware Maintenance Manual: Netfinity 7600 - Type 8665 Models 1RY, 2RY