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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]

ETS 300139
Integrated Services Digital Network (ISDN); Call Hold (HOLD) supplementary service; service description

Title (German)

ISDN; Zusatzdienst Rückfrage (HOLD); Dienstbeschreibung

Edition 1992-03

Original language English

Price On Request

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Table of contents

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Terminology

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

ETS 300139 Integrated Services Digital Network (ISDN); Call Hold (HOLD) supplementary service; service description

Rudolf Brandner

Want to learn more?

ETS 300139
Integrated Services Digital Network (ISDN); Call Hold (HOLD) supplementary service; service description