On an external keyboard, the key acts the same way as the key on the computer’skeyboard (if the External Hot Key option is enabled in the system setup program).External Numeric KeypadWhen you attach an external numeric keypad to the computer, the numeric keypad on the computerkeyboard is automatically disabled. The lights on the integrated keyboard track the operation of an externalnumeric keypad.Serial DevicesTo attach a serial device to the computer, use the 9-pin serial connector.The serial port passes data in serial format (one bit at a time over one line). This port supports a variety ofdevices that require serial data transmission, including a serial mouse, serial printer, plotter, or externalmodem.AC AdapterYou can attach the AC adapter to the computer by using the AC adapter connector. The AC adapterconverts AC power to the DC power required by the computer.You can connect the AC adapter with your computer turned either on or off.The AC adapter works with electrical outlets worldwide. However, power connectors vary among countries.Before using AC power in a foreign country, you may need to obtain a new power cable designed for use inthat country.Infrared PortThe computer’s infrared (IR) port lets you transfer files from your computer to another IR-compatible devicewithout using cable connections. When you receive your computer, the IR port is disabled. You can enablethe IR port by selecting the appropriate setting for the Infrared Data Port option in the system setupprogram.After you enable the IR port, to transfer files:1. Point the computer’s IR port directly at the compatible device’s IR port. IR devices transmit data in a30-degree cone of IR light.2. Start the data communications software on both devices, and then begin to transfer files. Read thedocumentation that came with your compatible device to make sure that you operate it correctly.NOTES: Make sure that no books, papers, or other objects come between the two IR devices andthat the two devices are within the 30-degree cone.If the IR device does not work, the computer and device may be misaligned. Move the device and
