scope:

This part of IEC 60875 applies to non-wavelength-selective fibreoptic branching devices, all exhibiting the following features: ?they are passive, in that they contain no optoelectronic or othertransducing elements; ? they have three or more ports for the entryand/or exit of optical power, and share optical power among theseports in a predetermined fashion; ? the ports are optical fibres,or optical fibre connectors. This standard establishes uniformrequirements for the optical, mechanical and environmentalproperties.