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TST 5500
Modem with built-in encryption

TST-5500 was a range of telephone modems with a built-in data encryptor, developed during the 1990s by Tele Security Timmann in Tutzing (Germany). 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 internal modem — was known as TST-5573.

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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.
  

TST 5573 and TST 5575
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.

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.
  

TST 5575
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.   

References
  1. Helmut 'Jim' Meyer, HS0ZHK, My way to Ham - Radio and beyond
    Website QRZ.COM. Personal correspondence. Retrieved July 2013.

  2. TST Timmann, TST-5500 Telefon-Modem mit integrierter Datenverschlusselung
    Sales datasheet, 5 pages (German). 18 April 2007. Retrieved July 2013 from [1]

  3. TST Timmann,
    TST-5573 Datenverschlüsselungsgerät für synchrone und asynchrone Übertragung

    Sales datasheet, 5 pages (German). 18 April 2007. Retrieved July 2013 from [1]
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Crypto Museum. Created: Monday 22 July 2013. Last changed: Sunday, 25 February 2018 - 08:44 CET.
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