Used as part of the LST No. 1A and has capacity for 4 additional buttons.

The telephone has a loudspeaker in place of the dial.

It superseded the Telephone No. 708 which only had provision for one additional button.

This is a Telephone No. 710L which is modified for use with Control Unit No. 8A & Amplifier No. 138B with Connector No. 1018A.

Circuit Diagram - N816.

Drawing - 91718.

Specification - S689.

Additional Information

Model Mark Grey Introduced Remarks
Telephone No. 716 Mk 1y 5/61 


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Last revised: February 10, 2023