EN 61280-4-4:2006 Fibre optic communication subsystem test procedures Part 4-4: Cable plants and links - Polarization mode dispersion measurement for installed links
2017EN 61280-4-4:2017 Fibre optic communication subsystem test procedures - Part 4-4: Cable plants and links - Polarization mode dispersion measurement for installed links
2006EN 61280-4-4:2006 Fibre optic communication subsystem test procedures Part 4-4: Cable plants and links - Polarization mode dispersion measurement for installed links