Panasonic KX-NS5180 6-Port Analog Trunk Card
Designed for use with network servers Panasonic KX-NS700 and their extensions KX-NS720.
Allows the connection of an additional six external analog lines (maximum 48 lines).
Built-in Caller ID on all ports with a standard FSK and DTMF.
Built-in reverse polarity detection and detection of damaged lines.
Telephone lines connecting it with 3 x RJ45 sockets (2 lines each well)