Panasonic PBX with VoIP Gateway Card will allow organizations to route both voice and fax communications over digital data networks. The VoIP Gateway card, designed to be easily integrated into existing IP networks, seamlessly bridges Public Switched Telephone Network (PSTN) and analog telephones with digital data networks without interrupting pre-existing data communications. This manual is an overview of the Panasonic 4-Channel VoIP Gateway Card, KX-TDA5480/KX-TDA0484.