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Do you have a flashlight? &nbsp;You can shine the light into the fiber on one end and should be able to see it on the other end. &nbsp;I've seen problems where the fiber were mislabeled and using this technique, I was able to find the correct pair. <br />
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Also check to see if the fibers get properly rolled. (i.e. Transmit to Receive) With the SC connectors you should be able to take the individual SC connectors out of the holder and reverse their position. <br />
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Cheers,<br />
Gary
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Do you have a flashlight?  You can shine the light into the fiber on one end and should be able to see it on the other end.  I've seen problems where the fiber were mislabeled and using this technique, I was able to find the correct pair.

Also check to see if the fibers get properly rolled. (i.e. Transmit to Receive) With the SC connectors you should be able to take the individual SC connectors out of the holder and reverse their position.

Cheers,
Gary

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The fix in this situation was to set one switch to AUTO and the other to 1000 on the speed.
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The fix in this situation was to set one switch to AUTO and the other to 1000 on the speed.

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I have a fiber optic cable that I cannot get to &quot;turn up&quot; on my HP 4108GL switchs. &nbsp;The modules I have in the switches are the HP ProCurve Gigabit-SX Tranceiver (J4131B) on both switches. &nbsp;The fiber optic I'm trying to use is a Corning 62.5/125 MM TB2 OFNR. &nbsp;I know the modules work with another fiber. &nbsp;I have switched the fibers to see if they were backwards, but no go. &nbsp;Any suggestions? &nbsp;The fibers are going directly into the switches. &nbsp;I have four fibers and none of them work. &nbsp;I do not have access to a fiber tester, so that is out. &nbsp;The fiber is new, so Im assuming the SC ends are OK.
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I have a fiber optic cable that I cannot get to "turn up" on my HP 4108GL switchs.  The modules I have in the switches are the HP ProCurve Gigabit-SX Tranceiver (J4131B) on both switches.  The fiber optic I'm trying to use is a Corning 62.5/125 MM TB2 OFNR.  I know the modules work with another fiber.  I have switched the fibers to see if they were backwards, but no go.  Any suggestions?  The fibers are going directly into the switches.  I have four fibers and none of them work.  I do not have access to a fiber tester, so that is out.  The fiber is new, so Im assuming the SC ends are OK.

Fiber Optics on HP switch

Networking hardware includes the physical devices facilitating the use of a computer network. Typically, networking hardware includes gateways, routers, network bridges, modems, wireless access points, networking cables, line drivers, switches, hubs, and repeaters. But it also includes hybrid network devices such as multilayer switches, protocol converters, bridge routers, proxy servers, firewalls, network address translators, multiplexers, network interface controllers, wireless network interface controllers, ISDN terminal adapters and other related hardware.