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
