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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 300485 V 1.3.1
Integrated Services Digital Network (ISDN) - Definition and usage of cause and location in Digital Subscriber Signalling System No. one (DSS1) and Signalling System No.7 (SS7) ISDN User Part (ISUP) [ITU-T Recommendation Q.850 (1998) with addendum modified]

Edition 2001-07-01

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 300485 V 1.3.1 Integrated Services Digital Network (ISDN) - Definition and usage of cause and location in Digital Subscriber Signalling System No. one (DSS1) and Signalling System No.7 (SS7) ISDN User Part (ISUP) [ITU-T Recommendation Q.850 (1998) with addendum modified]

Want to learn more?

OENORM EN 300485 V 1.3.1
Integrated Services Digital Network (ISDN) - Definition and usage of cause and location in Digital Subscriber Signalling System No. one (DSS1) and Signalling System No.7 (SS7) ISDN User Part (ISUP) [ITU-T Recommendation Q.850 (1998) with addendum modified]