20 Oct
2013
20 Oct
'13
4:13 p.m.
On Sun, 20 Oct 2013, joel jaeggli wrote:
It's a pretty normal situation. even with a 1-2m jumper I see light levels that are well below the maximum rx levels for 10km optics. e.g. the max might be .5 and the actual readings are -1.4 - -2.7. our WDM terminals sit in the the adjacent racks to the pop routers so they're all like that.
ER/ZR is another matter.
Yes, ER/ZR must be attenuated unless the run is sufficiently long. We have a link that's a bit too long for LR, but we still had to attenuate because the ER optics were reporting excessively high receive levels. jms