[38576] in North American Network Operators' Group
Re: POS OC48 interfaces using different wave length
daemon@ATHENA.MIT.EDU (Steve Feldman)
Thu Jun 7 13:41:16 2001
Date: Thu, 7 Jun 2001 10:40:40 -0700
From: Steve Feldman <feldman@twincreeks.net>
To: nanog@nanog.org
Message-ID: <20010607104040.A80796@twincreeks.net>
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In-Reply-To: <Pine.LNX.4.20.0106071650350.30471-100000@www.everquick.net>; from eddy+public+spam@noc.everquick.net on Thu, Jun 07, 2001 at 04:53:08PM +0000
Errors-To: owner-nanog-outgoing@merit.edu
> > Are 1310 and 1550 optics comptatible ?
>
> Can humans see ultraviolet light? These are two different wavelengths.
> The equipment is specifically designed and built to _not_ allow
> interaction between different wavelengths.
>
> One can run 1310 and 1550 on the same fiber with WDM, but 1310 and 1550
> won't talk to each other.
As someone already pointed out, the receivers
are often wide enough to see both wavelengths.
(Cheaper to build that way.)
So it might work, depending on the loss and dispersion
characteristics of the specific fiber installation.
But I'd be surprised if Cisco would actually support
that configuration...
An WDM demultiplexer typically has a passive narrowband
optical filter in front of the receiver to allow
only the desired wavelength through.
Steve
