How to connect Cisco 3550 and 3750 with fiber?

What SFP module would you use to connect a 3750 switch to a 3550 that is using a WS-G5486 Gigabit module?   Does anyone have experience with SX to LX adapters and if they are reliable?
pamsautoAsked:
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Craig BeckCommented:
You would need to use a GLC-LH-SMD transceiver for this, and a LC-SC single-mode patch cord (if they're being connected directly without an intermediate patch-panel).

They are very reliable and are used for long links, well over the length that SX modules can go.

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Don JohnstonInstructorCommented:
Looks like GLC-LH-SM is the SFP for your application.
Craig BeckCommented:
@don - GLC-LH-SM is EoS now - the replacement is the GLC-LH-SMD variant.  It's essentially the same thing but with DOM capability.

http://www.cisco.com/en/US/prod/collateral/modules/ps5455/eol_c51-698060.html
Don JohnstonInstructorCommented:
Roger that.  Thanks.
pamsautoAuthor Commented:
Got some compatible ones and they worked great!   Thanks for the info.
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