The LC-8 Line Concentrator eliminates the monthly charges for dedicated phone lines to each elevator cab in an office, college, hotel, hospital, etc. A call initiated by any emergency phone is sent to the C.O. line. Subsequent calls activate call waiting tones to alert the emergency personnel that another phone has gone off-hook.
All inbound calls are answered by the LC-8. The emergency personnel then dials a Touch Tone command to connect to one of eight phones.