Lamp Signalling Units
For use in Automatic exchanges areas, to provide a non-locking lamp calling signal on 700-type telephones, using Handset No. 7

These will fit Telephone No's 710, 711, 740, 741 and 746.

They are fitted between the hook switch upstands.

Introduced circa 1963.

Lamp Signalling Unit No. 1
Fitted with a Relay No. 16/8.

ATM Part - L96256.

Drawing - 91938 and 91939.
Diagram - SA10078.

Lamp Signalling Unit No. 2
Fitted with a Relay No. 16/20.

ATM Part - L6257.

Drawing - 91940 and 91941.
Diagram - SA10082.

Diagram - N1901.

 

Lamp Signalling Unit No. 1 Lamp Signalling Unit No. 2

 

 
 
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Last revised: September 02, 2024

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