[166384] in North American Network Operators' Group
Re: Pad 1310nm cross-connects?
daemon@ATHENA.MIT.EDU (=?utf-8?B?TcOlbnM=?= Nilsson)
Sun Oct 20 16:01:37 2013
Date: Sun, 20 Oct 2013 21:59:04 +0200
From: =?utf-8?B?TcOlbnM=?= Nilsson <mansaxel@besserwisser.org>
To: Chris Costa <ccosta92630@gmail.com>
In-Reply-To: <20131020052142.GB2783@besserwisser.org>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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Subject: Re: Pad 1310nm cross-connects? Date: Sun, Oct 20, 2013 at 07:21:42=
AM +0200 Quoting M=C3=A5ns Nilsson (mansaxel@besserwisser.org):
> Subject: Pad 1310nm cross-connects? Date: Sat, Oct 19, 2013 at 07:33:19PM=
-0700 Quoting Chris Costa (ccosta92630@gmail.com):
> > What are the opinions/views on attenuating short, 1310nm LR cross-conne=
cts.
> > Assume < 20m cable length and utilizing the same vendor optics on each
> > side of the link. Considering the LR transmit spec doesn't exceed the
> > receiver's high threshold value do you pad the receiver closer to the
> > median RX range to avoid potential receiver burnout over time, or just
> > leave it un-padded?
>=20
> LR usually needs padding in that scenario, IMHO. This also=20
My apologies. I was thinking not of 10km / 20km class optics but the
80-100km stuff. There, padding is quite necessary in short-range setups.
For 10/20km stuff, I, too, have run lots of 2m patch cords directly
between linecards without harm.
--=20
M=C3=A5ns Nilsson primary/secondary/besserwisser/machina
MN-1334-RIPE +46 705 989668
One FISHWICH coming up!!
Courtesy conversions: (km->miles, km-> miles, metres/100 -> feet)=20
10/1.6
6.25000000000000000000
80/1.6
50.00000000000000000000
200/(2.54*12)
6.56167979002624671916
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