Re: bidirectional fiber inline amps.

[Mihai Necsa <mihai () ploiesti rdsnet ro>]

specifications in lenght are for kids, adults use budgets :-) bx-d bx-u 
form cisco have a budget of 16dBmW (max), power form -3 to -9dBm and 
sensivity to -19dB. So if the fiber is under -10dB (this means roughly 
10/0.25dB per km SM att) you might see the light at 40km, I have a 
stable link for 37km whith stock bx-d bx-u

On 02/19/2013 11:15 PM, Eric J Esslinger wrote:
> Didn't see those. Thanks. Idiot moment for me.
>
> __________________________
> Eric Esslinger
> Information Services Manager - Fayetteville Public Utilities
> http://www.fpu-tn.com/
> (931)433-1522 ext 165
>
>
>
> > -----Original Message-----
> > From: Jared Mauch [mailto:jared () puck nether net]
> > Sent: Tuesday, February 19, 2013 2:43 PM
> > To: Eric J Esslinger
> > Cc: 'nanog () nanog org'
> > Subject: Re: bidirectional fiber inline amps.
> >
> >
> >
> > On Feb 19, 2013, at 3:30 PM, Eric J Esslinger wrote:
> >
> > > Due to some bundle size restrictions, we are looking at converting
> > > some runs over to use bi-directional fiber sfp's (the Cisco
> > version is
> > > GLC-BX-D/GLC-BX-U). However a couple of our runs are
> > farther than the
> > > spec 6.2 miles.  Is anyone aware of a vendor that makes an inline
> > > bidirectional amp for this sort of application? I did some
> > digging but
> > > either they do not exist or my google fu is weak today.
> >
> > So you really just want the 20km optics:
> >
> > GLC-BX-U20
> > GLC-BX-D20
> >
> > Most places also make 40km and 80km optics of the same sort.
> >
> > - Jared
>
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--
Mihai NECSA
rcs&rds Ploiesti