All:

It's been ions since I've worked with Fiber and I'm stuck off-site trying to
figure something out and could use some feedback. We ran Multi-Mode 62.5
Microns 6 strand fiber between two remote locations. At each location is a
3com 4500 switch which has a dual-personality SFP slot and a SC 1000BASE-SFX
Transeiver plugged-in and recognized by the switches. Specifically this
transceiver:
http://www.3com.com/products/en_US/detail.jsp?tab=features&pathtype=purchase&sku=3CSFP91

The fiber runs (not my doing) were run with LC connectors and the switch
supports SC only. I've purchased a single LC->SC patch cable and have it
plugged up on both ends, but no dice.

I'm not sure if i'm forgetting a fundamental connection requirement with
MMF, but hoping a few of you could shed some light. I've copied a link to
the image of the Fiber termination in my rack at the bottom of this email.

There are 3 LC connections in the picture. I have a LC/LC patch connected
between, for this discussion, the LC1 and LC3 while LC2 is connected into
the switch via the LC/SC patch. This connection topology is mirrored on the
remote side and no dice. I figure to connect the LC cables from LC1 to LC3
to complete the loop, per se. I've tried direct connections from all LC
ports into the switch without the rest of the cables connected and nothing
happens. e.g. I can't ping any devices on the either side and i don't see an
activity light on the switchport (FYI ports have been set as trunk ports and
permitting all vlans)

http://s396.photobucket.com/albums/pp44/sipe3202/Tech/?action=view&current=IMG00086-20100324-1340.jpg

Cheers,

Harry

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