Circuits
Fibre optics
Holes
Electronic equipment and components
Dimensional measurement
Interfaces
Shape
Optical fibres
Printed-circuit boards
Angles (geometry)
Fibre optic connectors
Optoelectronic devices
Link: BS EN IEC 62496-4-1:2019 Optical circuit boards Interface standards. Terminated waveguide OCB assembly using single-row twelve-channel PMT connectors
Source: BSI Standards
