nanog mailing list archives
Re: CWDM question
From: "Justin M. Streiner" <streiner () cluebyfour org>
Date: Fri, 13 Dec 2013 10:12:34 -0500 (EST)
On Thu, 12 Dec 2013, Keith wrote:
Fixed optics, there are no transponders, just a passive mux. No filters, though there is a pad on our side. Light levels on our side are good and within spec. I have been trying to find out from the SP what theirs are at presently, but when the circuit was first lit levels were taken and found to be within spec on bothends.
Another possibility is that the fiber you're using has higher attenuation at 1471nm than at 1310. While 1471 is outside of the 'water peak' band (E band - 1360-1460nm, centered at 1383nm, iirc), the type of fiber could could still have higher attenuation that runs into the S and O bands.
If replacing optics doesn't solve the issue, you'll probably need a test set that can test specifically at 1471 nm.
jms
Current thread:
- CWDM question Keith (Dec 12)
- Re: CWDM question Jared Mauch (Dec 12)
- Re: CWDM question Keith (Dec 12)
- Re: CWDM question Justin M. Streiner (Dec 13)
- Re: CWDM question Keith (Dec 12)
- Re: CWDM question Sam Roche (Dec 12)
- Re: CWDM question Keith (Dec 12)
- Re: CWDM question Christopher Costa (Dec 14)
- Re: CWDM question Keith (Dec 12)
- Re: CWDM question Jared Mauch (Dec 12)