This card will allow you to add up to 8 more of the KXT-7700 or KXT7300 series desktop telephones to you KX-TAW848 telephone system. You CAN NOT connect the KXT-0141 Cell stations to this card. You will need a KXT-AW84870 4-port Hybrid extension card for Cell Stations to work. This card is modular. So just plug the phones in to connect them to the system!