NF C93-807-4-2*NF EN 61280-4-2:2015 Fibre-optic communication subsystem test procedures - Part 4-2 : installed cable plant - Single-mode attenuation and optical return loss measurement
2015NF C93-807-4-2*NF EN 61280-4-2:2015 Fibre-optic communication subsystem test procedures - Part 4-2 : installed cable plant - Single-mode attenuation and optical return loss measurement