ATM TELEPHONE L11280 and L11311

 
TESTING HAND TELEPHONE

L11280
Testing Hand-Telephone (B.P.O. Telephone No. 80 Mark 236).

Used for testing automatic telephone exchange equipment. 

Comprising:-
Cast aluminium case fitted with receiver, inset transmitter, 0.3 microfarad capacitor, and press key for closing the circuit.

Includes two-way cord for connecting to test plug.

L11311
As the L11280 but is fitted with a 2 way plug for connecting to 2000 type selectors.


Taken from the 1951 ATM Catalogue

 
 
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Last revised: August 09, 2024

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