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Handset with microphone switch

Inventory number: T16 D.86.0.
Year of creation: 1908
Location: Hall 1

The integration of the microphone and the receiver in a "handset" contributed to the comfort of use. As an additional advantage, the movements of the handset could prevent the carbon grains from sticking together. A microphone switch was mounted in the handset handle of certain LB telephone sets. The microphone was powered by actuating this push button, thus saving battery life.

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