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