EN 61280-4-1:2004 Fibre-optic communication subsystem test procedures Part 4-1: Cable plant and links Multimode fibre-optic cable plant attenuation measurement
2009EN 61280-4-1:2009 Fibre optic communication subsystem test procedures - Part 4-1: Installed cable plant - Multimode attenuation measurement
2004EN 61280-4-1:2004 Fibre-optic communication subsystem test procedures Part 4-1: Cable plant and links Multimode fibre-optic cable plant attenuation measurement