[104137] in North American Network Operators' Group
Re: [NANOG] DWDM More Details
daemon@ATHENA.MIT.EDU (Alex Pilosov)
Fri Apr 25 13:58:29 2008
Date: Fri, 25 Apr 2008 13:58:09 -0400 (EDT)
From: Alex Pilosov <alex@pilosoft.com>
To: John Lee <john@internetassociatesllc.com>
In-Reply-To: <53A6C7E936ED8544B1A2BC990D254F94ECB10763@MEMEXG1.HOST.local>
Cc: NANOG <nanog@merit.edu>
Errors-To: nanog-bounces@nanog.org
On Fri, 25 Apr 2008, John Lee wrote:
> In your talk, I agree that the CAN with your CWDM is not that expensive
> but you also mention that the tighter DWDM with long haul optics is
> expensive ie "Everybody knows how to do (active) xWDM by giving a lot of
> money to (insert vendor of choice]:"
>
> When you talk about the tighter itu spacing for "real" DWDM and the
> lasers with fiber that can handle the power, jitter, chromatic
> dispersion et al. the optics you mention will not handle that.
>
> We have all duct taped optical systems on campus for the lab "and across
> the state of Georgia" see the Peach Net map.
>
> What is the largest number of lambdas you have actually run on a single
> fiber with your duct tape system and how bad was the optical cross talk?
I'd be curious to ask reverse question, did anyone *have* real problems
deploying duct tape systems, or power jitter chromatic dispersion is
vendor mumbo jumbo designed to make you buy their gear?
(within the distance limits spec'd, 80km dwdm etc)
-alex
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