LX sfp minimum range

Thu Jan 26 23:31:08 UTC 2012

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 at maunier.org>wrote:

> 2012/1/26 George Bonser <gbonser at 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
>