[162214] in North American Network Operators' Group
AW: 80 km BiDi XFPs
daemon@ATHENA.MIT.EDU (Thomas Weible - FLEXOPTIX)
Sat Apr 6 06:51:12 2013
From: Thomas Weible - FLEXOPTIX <Thomas.Weible@flexoptix.net>
To: Matt Addison <matt.addison@lists.evilgeni.us>, Frank Bulk
<frnkblk@iname.com>
Date: Sat, 6 Apr 2013 10:50:58 +0000
In-Reply-To: <7774244507336980754@unknownmsgid>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Matt Addison [mailto:matt.addison@lists.evilgeni.us] wrote:
>=20
> How much spare margin do you have? Could you roll your own with a pair
> of mismatched (C|D)WDM XFPs and a mux on each end?
Typically you have 23dB powerbudget for the ZR (CWDM or DWDM) - maybe +2 dB=
through selection of TOSA. A CWDM Mux will take 2dB and a small DWDM Mux a=
pprox. 4dB - you need two of them. This will drag your overall link-powerb=
udget below 20dB.
It might work if you add a FEC (either on the linecard or the XFP itself). =
This will add approx. 5dB to your powerbudget of 23dB. Take a CWDM Mux and =
fire x-crossed on 1550 and 1570 (maybe 1530) and you will face an attenuati=
on of approx. 0,2 - 0,25dB/km. This could work and you should be able to tr=
ansmit 80km to 90km. It's worth a test - also to figure out if dispersion w=
ill have an impact or not.
Thomas
> On Apr 2, 2013, at 19:16, Frank Bulk <frnkblk@iname.com> wrote:
>=20
> > Is anyone aware of a reputable supplier of 80 km BiDi XFPs? My regular
> > supplier of generics doesn't have an option for us, but I would really =
like
> > to avoid leasing additional fibers.
> >
> > Frank
> >
> >
>=20
>=20
