PRIVATE AUTOMATIC TELEPHONE EXCHANGES
CAPACITY 50 LINES
The initial equipment of this unit can be for as few as 10 or 20 lines Extensions may be added, when desired, up to a total of 50 lines. The switching equipment is enclosed in a cabinet of polished hardwood. The grass panelled front of the cabinet is hinged and provided with a lock. A lift out panel at the rear gives easy access to the wiring, A ringing vibrator incorporated in the unit converts battery current to AC. for ringing bells in the instruments.
Each telephone is connected to the unit by twin conductor.
Alternatively, use can he made of speaking telephone or key calling.
For D.C. mains supply up to 250 Volts.
THE RELIANCE TELEPHONE COMPANY LTD
Last revised: November 30, 2021