BS EN 50377-14-1:2018 Connector sets and interconnect components to be used in optical fibre communication systems. Product specifications Simplex and duplex cords made from simplex plugs with cylindrical ferrules, using EN 60793 2 50 single-mode B1 or B6 fibre for Category C according to EN 61753-1

Fibre optics
Optical fibres
Dimensions
Environment (working)
Optical properties of materials
Fibre optic connectors
Performance
Electronic equipment and components
Simplex transmission
Optical communication systems
Marking
Attenuation
Communication networks
Fibre optic cables
Environmental testing
Performance testing
Mechanical properties of materials

Link: BS EN 50377-14-1:2018 Connector sets and interconnect components to be used in optical fibre communication systems. Product specifications Simplex and duplex cords made from simplex plugs with cylindrical ferrules, using EN 60793 2 50 single-mode B1 or B6 fibre for Category C according to EN 61753-1
Source: BSI Standards