Safety rules for the construction and installation of lifts - Existing lifts - Part 83: Rules for the improvement of the resistance against vandalism; German and English version prEN 81-83:2023

Fibre optic interconnecting devices and passive components ? fiber optic connector optical interfaces ? - Part 3-81: Connection parameters of dispersion unshifted physically contacting fibres - Angled polyphenylene sulphide rectangular ferrules with one fibre row 12 fibre wide for reference connection applications

Fibre optic interconnecting devices and passive components - Connector optical interfaces for enhanced Macro bend multimode fibre - Part 3-81: Connector parameters of physically contacting 50 µm core diameter fibres - Non-angled polyphenylene sulphide rectangular ferrules with a single row of 12, 8, 4, or 2 fibres for reference connector applications (IEC 86B/4837/CDV:2024); German and English version prEN IEC 63267-3-81:2024

Protection of telecommunication lines against direct lightning flashes

Protection of telecommunication lines against direct lightning flashes

Protection of telecommunication lines using metallic symmetric conductors against lightning-induced surges