DIN EN IEC 61977:2019 Fibre optic interconnecting devices and passive components - Fibre optic fixed filters - Generic specification (IEC 86B/4156/CD:2018); Text in German and English
2022DIN EN IEC 61977:2022-08 Fibre optic interconnecting devices and passive components - Fibre optic fixed filters - Generic specification (IEC 61977:2020); German version EN IEC 61977:2020 / Note: DIN EN 61977 (2016-09) remains valid alongside this standard until 2023-05-14.
2019DIN EN IEC 61977:2019 Fibre optic interconnecting devices and passive components - Fibre optic fixed filters - Generic specification (IEC 86B/4156/CD:2018); Text in German and English