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Hydrogen Technologies Standards form the basic framework for market ramp-up
More information
Climate change Standards and specifications support climate targets
More information
Smart Farming Standards and specifications are drivers for the digitalization of agriculture
More information

Technical rule [CURRENT]

ETR 206
Public Switched Telephone Network (PSTN) - Multifrequency signalling system to be used for push-button telephones (CEPT T/CS 46-02 E-1985)

Edition 1995-09

Original language English

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Hydrogen Technologies Standards form the basic framework for market ramp-up

Climate change Standards and specifications support climate targets

Smart Farming Standards and specifications are drivers for the digitalization of agriculture

ETR 206 Public Switched Telephone Network (PSTN) - Multifrequency signalling system to be used for push-button telephones (CEPT T/CS 46-02 E-1985)

Michael Teigeler

Want to learn more?

ETR 206
Public Switched Telephone Network (PSTN) - Multifrequency signalling system to be used for push-button telephones (CEPT T/CS 46-02 E-1985)