Help with fiber SFP's

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Apr 21st, 2009
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My company is currently in the process of building a new multistory building and we plan to run 62.5nm fiber from each floor up to the server room. I talked to Cisco for help because I don't have a whole lot of experience dealing with fiber and they recommended using 1000Base-BX SFP's but as I read about them it seems like they are for single mode fiber, is this true? It seems like I should be using the GLC-SX-MM (1000Base-SX) SFP's for this; if anyone can help shed some light it would be greatly appreciated.

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Overall Rating: 4 (2 ratings)
Collin Clark Tue, 04/21/2009 - 13:43
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Scroll down to the table below the pictures (form the link). It will show what SFPs work with which fiber types.

Here is another helpful link.

Hope that helps.

c.captari Tue, 04/21/2009 - 23:14
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Yep, 1000base-bx seems to be for SMF (single mode fiber)

with GLC-SX-MM you can use multimode. be aware that the distance limitation can be up to 275m on a 62.5nm core

houstonrob Wed, 04/22/2009 - 06:27
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Hi and thanks for your replies. After I posted this question here I realized I should have posted it in the 'LAN, routing and switching' section. I reposted the question there and received many helpful responses. Thanks for your help


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