Panasonic KX-TD1232 is a digital phone system control unit, and is ideally suited for a growing business or a large home. It comes equipped for 8 lines, 16 multi-line digital phones PLUS 16 single-line analog phones or accessories. You can install up to two KX-TD170 expansion modules, for total system capacity of 32 multi-line digital phones PLUS 32 analog phones or accessories. The KX-TD180 adds four more phone lines. For even more phone power, you can link two KX-TD1232s together, for a maximum capacity of 24 lines with up to 128 phones and accessories. Caller ID is provided by the KX-TD193 circuit. The KX-TD1232 can handle up to four