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