Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-50: Examinations and measurements - Crosstalk for optical spatial switches
Edition 2013-07

Building intercom systems - Part 3-2: Application guidelines - Advanced security building intercom systems (ASBIS) (IEC 62820-3-2:2018) (german version)
Edition 2019-05-01

Building intercom system - Part 1-2: System requirements - Building intercom systems using the internet protocol (IP) (IEC 62820-1-2:2017) (german version)
Edition 2018-07-01

Building intercom systems - Part 2: Requirements for advanced security building intercom systems (ASBIS) (IEC 62820-2:2017) (german version)
Edition 2018-10-01

Fire detection and fire alarm systems - Part 16: Voice alarm control and indicating equipment
Edition 2008-06-01

Fire detection and fire alarm systems - Part 24: Components of voice alarm systems - Loudspeakers
Edition 2008-07-01

Building intercom systems - Part 3-1: Application guidelines - General (IEC 62820-3-1:2017) (german version)
Edition 2019-02-01

GRAFCET specification language for sequential function charts
Edition 2013-06

Microphones and earphones for speech communications
Edition 2002-06

Ergonomics of human-system interaction - Part 154: Interactive voice response (IVR) applications (ISO 9241-154:2013)
Edition 2013-05-15