KX-TAW848-70
Connect up to 4 of any KXT7700, KXT7300, KX-T7000, KX-T7100, KXT-1041 or KX-T0155 Cell Stations or Panasonic Voicemail systems to your KX-TAW848 phone system. One of these cards COMES WITH the base system. Add another and you will have 8 Hybrid Extension ports.