The TC-M Series is an internal telephone type system that will support up to two masters and sixty handset sub stations.
Single or dual master system, expandable to 80 stations
10 and 20-call masters, with 20 and 40-call add-on selectors
Handset sub stations
Pick up handset to call, with tone and LED annunciation at master
Handset subs talk to each other through connection at master