Re: question about optics

Hi Justin,

On Wed, Jun 10, 2009 at 11:32 PM, Guagliata,
Justin<JGuagliata_at_leegov.com> wrote:
> I've ran into a couple older deployments that erroneously have a ZX GBIC
> with a single mode connection into another switch with a LX/LH SFP (the
> span is < 100feet without attenuation on either end). These links have
> been up for years like this. I always thought the following about Cisco
> optics in regard to frequency.

From: http://puck.nether.net/pipermail/cisco-nsp/2009-March/059101.html

Mikael Abrahamsson swmike at swm.pp.se
Fri Mar 13 14:21:15 EDT 2009

""All" 1310nm optics have wideband receivers so getting the ZX into the LX
at the other end is not a problem (apart from that you might want to
attenuate it 5-10dB at the ZX launch end), and the ZX has -24dB receiver
sensitivity meaning you gain there as well."

From: http://puck.nether.net/pipermail/cisco-nsp/2009-March/059106.html

Richard A Steenbergen ras at e-gerbil.net
Fri Mar 13 16:48:17 EDT 2009

"1. All SMF optics have wideband receivers and will happily accept any
signal from any other source (typically 1270-1610nm), with absolutely no
requirement that it match what the other side is sending. Don't think of
a fiber circuit as a single link, think of it as two completely distinct
links running in opposite directions which just happen to be parallel to
each other for TX and RX."

Cheers,
Dale

Blogs and organic groups at http://www.ccie.net
Received on Thu Jun 11 2009 - 08:45:19 ART