Intruder alarm systems, Part 4: Wire-free systems installed in client's premises
Edition 1990

Intruder alarm systems, Part 4: Wire-free systems installed in client's premises
Edition 1990

Access and Terminals (AT) - Ordinary quality voice bandwidth 4-wire analogue leased line (A4O) - Connection characteristics and network interface presentation
Edition 2001-11-01

Access and Terminals (AT) - Special quality voice bandwidth 4-wire analogue leased line (A4S) - Connection characteristics and network interface presentation
Edition 2001-11-01

Access and Terminals (AT) - Ordinary and Special quality voice bandwidth 4-wire analogue leased lines (A4O and A4S) - Terminal equipment interface
Edition 2001-11-01

BUSINESS TELECOMMUNICATIONS (BTC). ORDINARY AND SPECIAL QUALITY VOICE bandwidth 4-wire analogue leased lines (A4O and A4S). Attachment requirements for terminal equipment interface.
Edition 1997-07-15

Universal serial bus interfaces for data and power - Part 4: Universal Serial Bus Cables and Connectors Class Document, Revision 2.0 (IEC 62680-4:2013); English version EN 62680-4:2014
Edition 2014-11

Aluminium and aluminium alloys - Drawing stock - Part 4: Specific requirements for welding applications; German version EN 1715-4:2008
Edition 2008-07

Light and lighting - Measurement and presentation of photometric data of lamps and luminaires - Part 4: LED lamps, modules and luminaires; German version EN 13032-4:2015+A1:2019
Edition 2019-11

Thermal energy meters - Part 4: Pattern approval tests; German version EN 1434-4:2022
Edition 2023-03