Panasonic KX-NS5174The Panasonic KX NS5174 is a 16 port Single Line Telephone (SLT) card that adds up to 16 analog internal lines and devices to Panasonic KX NS700 and KX NS1000 series communication platforms. It supports FSK Caller ID and Message Waiting Indication on all ports and features 4 RJ45 sockets for connections. The card, also known as the MCSLC16, is used in conjunction with the KX NS500, KX NS700, and their associated shelf expansions to expand the system's