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Bildschirmtext was an early German online service. Technology wise it comes from the Teletex group of standards.

Control Codes

There is a good introduction into the control codes here.


A software decoder can be found here:

The software on the central station is here:

The software modem for Asterisk is here:

Blog and Mailinglist

btx ät lists (dot) hanse (dot) de


Casandro (Christian Berger)

christian (ät) clarke-3 (dot) de

Teletext Archive

Sources for the Videos in this talk

Bildschirmtext Werbung 1987

heute Journal

Xaver und sein außerirdischer Freund

Lihmal in "Feel the Motion"