AIPHONE NEM-30-C 30-Call Master Lamp Memory System

30-Call Master Lamp Memory System is a selective calling open voice style intercom system. Features: 30 Stations Console master system with Lamp Memory, where call-in signal remains until answered Expandable to 120 stations with the addition of 20 and 40 call add-on selectors Push-to-talk, hands free at sub station Selective calling, Group calling, or All Call Separate transmit, receive, All Call, and call tone volume controls Wall or desk mounted