[c-nsp] Catalyst SX GBIC's and SMF - Church, Chuck - net.nether.puck.cisco-nsp

11 messages in net.nether.puck.cisco-nsp[c-nsp] Catalyst SX GBIC's and SMF

From	Sent On	Attachments
Robert Walton	Jan 7, 2005 3:11 am
Mikael Abrahamsson	Jan 7, 2005 3:36 am
Justin M. Streiner	Jan 7, 2005 12:28 pm
Lindahl, Carl	Jan 7, 2005 12:36 pm
Tim Winders	Jan 7, 2005 1:54 pm
Tristan Gulyas	Jan 10, 2005 5:15 am
Church, Chuck	Jan 10, 2005 8:39 am
Niels Bakker	Jan 10, 2005 8:58 am
Bill Wichers	Jan 10, 2005 1:16 pm
Mikael Abrahamsson	Jan 10, 2005 3:51 pm
Bill Wichers	Jan 10, 2005 4:59 pm

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Subject:	[c-nsp] Catalyst SX GBIC's and SMF	Actions...
From:	Church, Chuck (cchu...@netcogov.com)
Date:	Jan 10, 2005 8:39:02 am
List:	net.nether.puck.cisco-nsp

For what it's worth, here is info on distances for both GBICs and SFPs: SFP - http://www.cisco.com/en/US/products/hw/modules/ps5000/products_data_shee t09186a008014cb62.html GBIC - http://www.cisco.com/en/US/products/hw/modules/ps872/products_data_sheet 09186a008014cb5e.html

Table One in both cases. LX will provide much longer distance on MM if you're stuck using 62.5 micron cable, maybe that's what they were referring to.

-----Original Message----- From: cisc...@puck.nether.net [mailto:cisc...@puck.nether.net] On Behalf Of Tristan Gulyas Sent: Monday, January 10, 2005 5:16 AM To: cisc...@puck.nether.net Subject: Re: [c-nsp] Catalyst SX GBIC's and SMF

All,

I have seen an installation where mode conditioning cables are used to go between LX SFP modules with MM fibre. I have no idea about the reverse (SX GBICs with SM fibre) although I don't see why this wouldn't be possible.

I have been told that running 1000baseLX with MM fibre + mode conditioning patch cables gives you "slightly better" range than using native SX, but

there's no solid evidence for this, so I'd stick to the 550 metre spec as per 1000baseSX to be safe.

With respect to the original problem, it depends on how the fibre runs between the cat4000s (whether it's just "across the floor" or whether there's cable running through a building) It may be substantially cheaper to aquire a MM fibre patch cable vs. purchasing LX GBIC/SFP modules.

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