Fibre optic interconnecting devices and passive components performance standard - Part 111-9: Sealed closures for category S - Subterranean (IEC 86B/4298/CD:2020); Text in German and English
Fibre optic interconnecting devices and passive components - Performance standard - Part 1: General and guidance (IEC 61753-1:2018 + COR1:2019); German version EN IEC 61753-1:2018 + AC:2019— 68 стр.
