Can I run these 10GBase-ER4 SFP+ 40Km optics on a 5m distance without attenuators?
Posted by Hassan khanafer on 2017 Dec 30th
Thumb rule:
10km: No Attenuation needed
40km: 4db attenuator at 20km, -8db at 10km
80km: 10db attenuator at 40km, 15db at 20km, not recommended lower than 20km