LEM-1 with SP-20N/A Ceiling Speaker, with and without Call Button

1 LEM-3 Answering Station with 2 SP-20N/A Ceiling Speakers

1 LE-D Door Station, 3 LEM-1 Answering Stations

1 LE-D Door Station, 3 LEM-3 Answering Stations

1 LE-SSR Door Station, 2 LEM-1 Answering Stations

2 LE-A Sub Stations, 1 LE-AN Sub Station, 2 LEM-3 Answering Stations

2 LE-D Door Stations, 2 LEM-3 Answering Stations

2 LE-D Door Station, 3 LEM-3 Answering Stations

3 LEM-1 Answering Stations with SP-20N/A Ceiling Speaker, without Call Button