Federal Office for Approvals in Telecommunications

The Federal Office for Approvals in Telecommunications (German: Bundesamt für Zulassungen in der Telekommunikation, BZT) was a federal agency in Germany responsible for approving telecommunication devices. It was seated in Saarbrücken.

History
The BZT was founded in 1982.

Criticism
Because cheap modems from the United States were banned, the Chaos Computer Club published schematics of modems. The Datenklo modem became well known.