UNE-EN IEC 61755-6-2
Fibre optic interconnecting devices and passive components - Connector optical interfaces - Part 6-2: Connection of 50 µm core diameter multimode physically contacting fibres - Non-angled for reference connector application, at wavelength of 850 nm using selected A1a fibre only (Endorsed by Asociación Española de Normalización in October of 2018.)