Panasonic KX-NS5180 6-Port Analog Trunk Card is Designed for use with network servers Panasonic KX-NS500 and their extensions KX-NS520. The Panasonic KX-NS5180 is a LCOT6 card for conneting external analog lines. The card has been designed to work with network servers KX-NS500 & KX-NS520. The device allows you to connect 6 additional external analog lines and can add up to 48 lines maximum. It incorporates caller ID feature on all ports with a standard FSK and DTMF. The device is also capable of detecting reverse polarities and damaged lines as a built-in feature. There are two emergency ports available for emergency which can operate without power. The card comes equipped with 3 RJ45 slots.