[166383] in North American Network Operators' Group
Re: Pad 1310nm cross-connects?
daemon@ATHENA.MIT.EDU (Justin M. Streiner)
Sun Oct 20 15:59:09 2013
Date: Sun, 20 Oct 2013 12:13:06 -0400 (EDT)
From: "Justin M. Streiner" <streiner@cluebyfour.org>
To: nanog@nanog.org
In-Reply-To: <4467732C-E306-493A-99D9-BC93E6FD3BE4@bogus.com>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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
