Telephone, House, Wall, Direct Call, Intercommunication, secret, 15 way.

Used in conjunction with the single way Telephone No. 37.

Telephone includes (1928):-
1 x Hook for Micro telephone.
1 x Switch Selector.
1 x Bell, Trembler.
1 x Press Button.
1 x Vibrator.
1 x Coil Induction.
1 x Relay, Cut-in.
1 x Telephone No. 32.

Handset is a Telephone No. 32.

Made obsolete in 1947.

Circuit Diagram - TL 232.

Circuit Diagram - N143.

Note - that there is an indicator in the top box.

Information on all House telephone systems

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Last revised: February 06, 2023