On Tue, 16 Jun 2009, FF wrote:
I thought Chromatic Dispersion is distance related. This is supposed
Yes it is.
to be SMF-28 DSF, the optics are supposed to be 80km (XENPAK DWDM 1600 ps dispersion tolerance). Do you need a DCU even when operating within that range? One of the links is only about 40-50km.
Well, you didn't say the links were DC or not, and you didn't say how long the link was. At 40-50km, CD is most likely not the cause of your problems.
According to some info I found, SMF-28 DSF still has 17.1ps/nm/km, meaning your 1600ps dispersion tolerance only gets you 94km? I might be wrong though, I can't get the whole article, google only displays from its cache.
Is there a Cisco command to pull up the BER the optic is seeing?
No, on GE you can only see it by sending traffic and observing the error counters.
-- Mikael Abrahamsson email: [email protected] _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
