Homepage
Crypto
Index
Glossary
Enigma
Hagelin
Fialka
Nema
AT&T
Datotek
Gretag
HELL
ITT
Motorola
Mils
OMI
Philips
Racal
Siemens
STK
Tadiran
Telsy
Teltron
Transvertex
TST
USA
USSR
UK
Yugoslavia
Voice
Hand
OTP
EMU
Mixers
Phones
FILL
Codebooks
Algorithms
Spy radio
Burst encoders
Intercept
Covert
Radio
PC
Telex
People
Agencies
Manufacturers
• • • Donate • • •
Kits
Shop
News
Events
Wanted
Contact
About
Links
   Logo (click for homepage)
Siemens T-1285CA
Online/offline teletype encryptor - wanted item

The T-1285CA was an electronic device for the online/offline encryption and decryption of text-based messages. It was based on a T1285 teleprinter unit developed by Siemens AG in Germany, with the optional built-in cryptographic heart developed by Philips Crypto BV in The Netherlands.
 
The machine was developed as the successor to the T-1000CA Aroflex, a machine based on the Siemens T-1000 teleprinter with a crypto unit, developed by Philips, mounted at the bottom.

The new T-1285CA was intended as a plug-in replacement for the Aroflex and was developed in close collaboration with Philips Crypto BV.

A complete setup consists of a main unit, a monitor, a printer and an (optional) paper-tape reader/puncher. All units meet NATO TEMPEST requirements [1]. It is also known as the Philips PDLX-6141, but is generally called Aroflex II [2].
  
Click for more information. Photograph taken from the brochure [1].

Development of the T-1285CA took many years and costed millions of Dollars. Introduction of the machine was delayed several times and by the time it was introduced, in the mid-1990s, teletype machines were rapidly being replaced by computers. As a result, only a limited number of machines were produced and sold, before Philips and Siemens decided to end the project.
 

 For a detailed description of the T-1285CA, please refer to the Philips Aroflex II-page.
 

 
Hagelin
The basic T-1285 teleprinter unit was also adopted by Crypto AG (Hagelin) in Switzerland as the body for their HC-5700 and HC-5750 cipher machines [3]. Although the Hagelin-version looks similar, it has a different crypto heart and is not compatible with the NATO approved T-1285CA. The HC-5700 remained in production long after Siemens had discontinued the T-1285CA [3].
 
References
  1. Siemens, TEMPEST Crypto Communications System T1285CA
    Full-colour 6-page brochure of the T-1285CA.

  2. Philips Crypto BV, Crypto Communications System AROFLEX II
    Full-colour 6-page brochure of the PDLX-6141 Aroflex II. NATO Restricted. 1993.

  3. Jane's Military Communications, Eighteenth Edition, 1997-98
    ISBN 0-1706-1530-2.

Further information

Any links shown in red are currently unavailable. If you like the information on this website, why not make a donation?
Crypto Museum. Last changed: Sunday, 13 September 2015 - 09:47 CET.
Click for homepage