BS EN 50377-18-1:2019 Connector sets and interconnect components to be used in optical fibre communication systems. Product specifications type 4+4×10.3125 Gb/s MPO (QFSP) transceiver mated with an MPO connector equipped with 12 fibre PPS ferrules terminated on EN 60793-2-10 category A1a.3a or A1a.3b 50/125 micron multimode fibre

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

Link: BS EN 50377-18-1:2019 Connector sets and interconnect components to be used in optical fibre communication systems. Product specifications type 4+4×10.3125 Gb/s MPO (QFSP) transceiver mated with an MPO connector equipped with 12 fibre PPS ferrules terminated on EN 60793-2-10 category A1a.3a or A1a.3b 50/125 micron multimode fibre
Source: BSI Standards