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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

Standards [CURRENT]

OENORM EN 301065-1 V 1.2.2
Integrated Services Digital Network (ISDN) - Completion of Calls on No Reply (CCNR) supplementary service - Digital Subscriber Signalling System No. one (DSS1) protocol - Part 1: Protocol specification

Edition 1999-01-01

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

OENORM EN 301065-1 V 1.2.2 Integrated Services Digital Network (ISDN) - Completion of Calls on No Reply (CCNR) supplementary service - Digital Subscriber Signalling System No. one (DSS1) protocol - Part 1: Protocol specification

Want to learn more?

OENORM EN 301065-1 V 1.2.2
Integrated Services Digital Network (ISDN) - Completion of Calls on No Reply (CCNR) supplementary service - Digital Subscriber Signalling System No. one (DSS1) protocol - Part 1: Protocol specification