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Modem with built-in encryption
The TST-5500 was a telephone modem with a built-in cipher unit,
developed and built by Tele Security Timmann
in Tutzing (Germany)
during the 1990s. The device is suitable for the encryption and
decryption of computer data at speeds between 1200 and 28.800 baud.
A simplified version of the unit, without the modem part, was known
as TST-5573.
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THIS PAGE IS A STUB
This page currently acts as a placeholder for future information
about this device. Crypto Museum is still looking for this device
in order to expand our collection of TST equipment. If you have
such a device available, or if your have additional information,
please contact us.
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Cipher unit for computer data
- wanted item
The TST-5573 was a simplfied version of the TST-5500. It did not contain
a modem, so that no approval from the national PTT was required.
Instead the unit was inserted between the serial RS-232 line of the
computer (COM-port) and the existing modem. The case was nearly identical
to that of the TST-5500, but had no LCD display at the front.
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The TST-5573 was available in two variants: in a ruggedized
military-grade aluminium housing, such as the one shown in the image
on the right, and in a plastic enclosure similar to a regular modem
(shown in the iamge below).
THIS PAGE IS A STUB
This page currently acts as a placeholder for future information
about this device. Crypto Museum is still looking for this device
in order to expand our collection of TST equipment. If you have
such a device available, or if your have additional information,
please contact us.
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This is the plastic case variant of the TST-7753, which is also
known as Option 5573-8 [3]. The same case was later used
with the TST-5575, a high-speed version of the TST-5573.
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© Copyright 2009-2013, Paul Reuvers & Marc Simons. Last changed: Sunday, 11 August 2013 - 17:10 CET
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