CENTRAL BATTERY AUTOMATIC REPLY AND CALL SYSTEM
The ‘‘Sterling” Automatic Reply and Call System has been designed for cases where it is not desirable or convenient to use a Central Station Annunciator Switchboard. It. is, generally speaking, most useful where the Principal wishes to call all the outer offices, and vice versa.
Any inter-communication Telephone illustrated on pages 23 to 26 may be used as the Central Station, or Principal’s, Instrument, but when ordering state: “ For C.B. Reply and Call System.”
The advantages of the “ Reply and Call” System are numerous, but the following may be specially noted:
AUTOMATIC REPLY AND CALL BATTERY RINGING
No. U 500
Reply and Call Wall Telephone, comprising Granular Carbon Transmitter (No. U 45), Induction Coil, Double Pole Watch Receiver (No. U 30). Call Bell, Automatic Switch Hook and Patent Combined Ringing Key and Call Wire
Metal Parts Nickel-plated Woodwork Solid Walnut.
Taken from the Sterling Catalogue No. 11 & 12
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