2400 BPS Pocket Faxmodem (250-3105) Power Faxback Doc. # 5770 The Power Cube The power cube that comes with the faxmodem plugs into any standard 110 volt, 60 cycle outlet, the kind found in the U.S. The faxmodem must be used only with the power cube provided with the manufacturer. Simply plug the power cube into any standard 115 volt outlet, and then into the jack marked "Power". Using Battery Power Alternatively, you can run the faxmodem using a 9 volt battery. An alkaline battery will provide a longer operating time and is highly recommended. You can also use a rechargeable battery. To conserve battery power, turn off the faxmodem when it is not in use. When battery power is low, the LB (low battery) light comes on (as long as you are attempting to use battery power). Using a fresh, good quality, alkaline battery under normal operating conditions, you can expect to use the faxmodem for at least seven hours of continuous data transmission. When the faxmodem enters sleep mode (see below), the battery will last about 100 hours. Getting Power via Your PC's Serial Port If your faxmodem is connected to a 25-pin D connector on a PC-compatible computer, you may be able to power the faxmodem from the computer, without the need for a battery or a power cube. Whether this will work depends on your computer. You can find out by removing the battery, disconnecting the faxmodem from the power cube, and connecting the faxmodem to the PC's serial port. If the MR light is on, your computer may supply the necessary power. Switching from One Power Source to Another If you are using battery power and the low battery light comes on, do not switch to the power cube by simply plugging it in. Instead, finish what you are doing, turn the faxmodem off, and then plug in the power cube. Likewise, you should not disconnect the power cube from the faxmodem and expect to immediately switch to battery power or serial port power. Sleep Mode Your faxmodem is designed to save power by automatically entering "sleep mode" when it encounters five seconds of no activity. While this feature is particularly relevant to battery operation, sleep mode will also occur when you are using the power cube or getting power via the serial connector. You don't have to do anything to enable sleep mode, nor can you disable this feature. The MR light dims when the faxmodem is in sleep mode. The faxmodem does still use some power in this mode, so it is advisable to turn it off if it is not in use and you are running on battery power. Power Up and Installation Testing Flip the power switch on your faxmodem to the ON position. The MR (Modem Ready) light should come on. Depending on various faxmodem settings and factors external to the modem, other lights may be on. When you first turn on the faxmodem, it automatically performs a self-test to verify that it is functioning properly. This test operates in the "analog loopback mode" using internally generated test patterns. If an error is found, it will send an error message to the monitor the first time it is used. (smc-12/28/93)