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Wire tapping
German armed forces of WWII

During World War Two (WWII), the German armed forces (Wehrmacht) — and the Army (Heer) in particular — used wired analogue telephone lines, also known as land-lines, whenever possible. Much of their communications ran over the existing telephone lines in Germany and in occupied countries like France, the Netherlands and Norway. In addition to this, ad-hoc field telephone configurations were used, which were sometimes linked to the public switched network (PSTN).

As the Germans trusted nobody, not even their own officers, security services like the Gestapo 1 often eavesdropped on critical communication lines. Special equipment was developed for this purpose, ranging from small portable devices, to multi-channel tapping and recording systems.

  1. Gestapo = Geheime Staatspolizei (Secret State Police).  Wikipedia

Wehrmacht wire tapping devices on this website
Lauschempfänger (intercept amplifier) LE-35 Lauschempfänger (intercept amplifier) LE-40 Verstärker 41 (amplifier 41) Drahtlauschempfänger (klein). Wire tapping device (WWII).
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© Crypto Museum. Created: Friday 01 September 2017. Last changed: Saturday, 21 October 2017 - 12:00 CET.
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