[c-nsp] GLC-SX-MM and 50µm mm fiber

Michael Balasko Michael.Balasko at cityofhenderson.com
Mon Nov 13 15:08:35 EST 2006

We just went through this "discussion". We had the company that manufactures our cable sold us on the idea of 50 micron cable and we installed in it a few locations. 

Here is what we got of it-
1. Now need to actively,  accurately distinguish and document between 50/62.5/SM at all locations.(aka even more work) 
2. The Aqua fibers sure are pretty, but now we need to stock those too. (aka more inventory)
3. Our local cable guys in Nevada seem not to stock as much 50 micron as others (crunch time = more fun)
4. Single mode doesn't carry the nasty premium it used to. (So why not use it?)

We decided since we can stick an LX Gbic within 7 feet of the other why not just scrap all this multimode nonsense in the firstplace? http://www.cisco.com/en/US/products/hw/modules/ps5455/products_data_sheet09186a008014cb5e.html

Ultimatly we landed on using SM for everything, and it reduced our cost and complexity. 
One type of gbic, mode conditioning patch cords are a thing of the past, only one type of patch cord to stock. 
Hopefully, someone on the list doesn't come up with the one reason we shouldn't of:) 

Hope that helps and feel free to email me offlist for any additional details/questions you may have. 

Michael Balasko
Network Specialist II
City of Henderson
240 Water St. 
Henderson, NV 89015
p. 702-267-4337
f. 702-267-4302

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Adam Greene
Sent: Monday, November 13, 2006 10:39 AM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] GLC-SX-MM and 50µm mm fiber


We're about to roll out some 3560G's with GLC-SX-MM's, and I see they are rated for use with both 62.5µm and 50µm multimode fiber. We're accustomed to deploying 62.5µm fiber but have been learning that 50µm is probably more forward-looking in terms of being able to support 10Gbps if we later upgrade the 3560G's.

I assume the GLC-SX-MM should work fine with 50µm but just wanted to make sure there aren't any reasons I'm not thinking of why we should stick with 62.5µm.

Any input would be appreciated.


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