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The image on the right shows one of the rare images of the MA-4400,
which was probably taken from the operating instructions or a sales
brochure. The device is housed inside the plastic enclosure of a regular
desktop telephone set, and is controlled by the buttons of the keypad.
Compared to a regular telephone set, the MA-4400 has some additional
features, such as a push-to-talk (PTT) button on the handset, a secure
indicator and a recall button at the top.
The device is interoperable with the MA-4024
and MA-4225 voice scramblers.
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© Crypto Museum. Created: Monday 02 March 2020. Last changed: Monday, 02 March 2020 - 17:19 CET.
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