The Iridium L-Band frequency transceiver is a stand-alone module that provides developers a module that can be integrated into application based equipment or dedicated terminal developments. The transceiver is intended for incorporation into a final Iridium application/product that would supply power to the unit as well as the appropriate data and or voice interface. Data applications are also supported through an RS-232 serial interface and the 9522B uses the DPL bus for digital voice communications.