[148970] in North American Network Operators' Group
Re: LX sfp minimum range
daemon@ATHENA.MIT.EDU (PC)
Thu Jan 26 18:31:31 2012
In-Reply-To: <CAEGdXrMo7De6jWpnfv-t+BbwrZ7_eXp56L6cy+TEv3x1G_KfAw@mail.gmail.com>
Date: Thu, 26 Jan 2012 16:31:08 -0700
From: PC <paul4004@gmail.com>
To: Pierre-Yves Maunier <nanog@maunier.org>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
In some enterprise applications, SX is "good enough" for the distances at
hand, and SX optics are cheap...
On Thu, Jan 26, 2012 at 3:33 PM, Pierre-Yves Maunier <nanog@maunier.org>wrote:
> 2012/1/26 George Bonser <gbonser@seven.com>
>
> >
> > SX can actually be a little more versatile. LX works only over single
> > mode fiber. SX is designed to work over either. As long as you have SX
> at
> > both ends, you can connect them with either single or multimode fiber as
> > long as the fiber type is consistent over the entire run.
> >
> >
> >
> It's the contrary.
> SX only works on multimode fibre, not on singlemode.
>
> LX can work on both.
>
>
> It can happends that SX works on singlemode but it can fail anytime.
>
> LX over multimode fibre is documented on Cisco SFP/GBICs datasheets.
>
>
> http://www.cisco.com/en/US/products/hw/modules/ps4999/products_tech_note09186a00807a30d6.shtml
>
> Cisco 1000BASE-LX/LH SFPGLC-LH-SM1SFP-GE-L2Operates on standard single-mode
> fiber-optic link spans of up to 10 km and up to 550 m on any multimode
> fibers.
>
>
> --
> Pierre-Yves Maunier
>
