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TopSec 703
ISDN voice and data encryptor - this page is a stub

TopSec 703 is a voice and data encryptor for ISDN telephone networks, introduced around 1989 by Siemens in München (Munich, Germany). The device is part of the TopSec family of devices and enables highly secure calls between parties that use a TopSec product. The 703+ is compatible with the TopSec GSM. The TopSec product line was taken over in 2001 by Rohde & Schwarz (R&S).

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Siemens TopSec 703 ISDN encryptor
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Siemens TopSec 703 ISDN encryptor

Pricing
Below is the pricing of the TopSec 7xx units in 2001 [2].

  • TopSec 701
    DM 800
    EUR 400
    PCMCIA card (Windows)
  • TopSec 703
    DM 1,956
    EUR 1,000
    -
  • TopSec 703+
    DM 2,540
    EUR 1,250
    Compatible with TopSec GSM
  • TopSec 730
    DM 14,800
    EUR 12,400
    For 30 ISB simultaneous calls
  • TopSec GSM
    DM 6,259
    EUR 3,130
    Mobile phone
Documentation
  1. TopSec 703 - Brochure (German)
    PD 0757.6910.11R&S SIT, January 2009. 2 pages.

  2. Members only - confidential telephone and data communication (product family)
    Christine Hagn, R&S News 173, 2002/I pp. 48-51.

  3. Secured communications for global players
    Dr Hartmut Ilse, R&S News 186, 2005/II pp. 53-55.
References
  1. Helmut Singer, TopSec 703 unit with documentation - THANKS !
    Received January 2019.

  2. Streng vertraulich bleibt streng vertraulich
    ChannelPartner. 15 November 2001.
Further information
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Crypto Museum. Created: Sunday 26 September 2021. Last changed: Wednesday, 27 October 2021 - 09:06 CET.
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