Fibre optic interconnecting devices and passive components performance standard - Part 021-2: Grade C/3 single-mode fibre optic connectors for category C - Controlled environment
This part of IEC 61753 defines C/3 minimum initial test and measurement requirements and
severities which a single-mode connector/cable assembly must satisfy in order to be
categorized as meeting the IEC standard category C (controlled environment), as defined in
Clause A.2 of IEC 61753-1.