We currently have two HP Procurve 2312s connected using two 100-FX-SC transceivers. I am looking to upgrade to new managed Cisco Catalyst switches that use 1000Base-SX transceivers, will the same cabling I have now work or what will I need to upgrade to make it work?

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    What kind of cabling is it? Multimode, singlemode, diameters? – Chris S Mar 10 '10 at 0:55
  • I'm not sure how would I check? – Byron Wilcox Mar 10 '10 at 0:56
  • It should say a number on the cable. For instance 62.5/125 and 50/125 are very common multi-mode fibers. If it's 50/125 it should also say OM1, OM2, or OM3. 2 and 3 will support 1 Gbps (3 supports 10Gbps). Otherwise it might say 8/125 or 10/125 for single-mode fibers. – Chris S Mar 10 '10 at 1:00
  • it is 62.5/125 other information on the tag was a tripplite part#N304-003 and SC-ST 0.9M – Byron Wilcox Mar 10 '10 at 1:16

it is 62.5/125 other information on the tag was a tripplite part#N304-003 and SC-ST 0.9M

That will support Gigabit Ethernet over that distance. However you need to check that the physical interface on the new switch transceiver matches your current transceiver (which is SC) and I suspect they won't match.

You can use this chart to help identify connectors, if you know the model of the Cisco switch. It's likely that it is using a SFP module.

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  • Cisco Catalyst 2960-8TC and Cisco Catalyst 3560-12PC – Byron Wilcox Mar 10 '10 at 20:04
  • well the distance from one office to the other is about 400 ft, that is only the wire from the switch to the wall. – Byron Wilcox Mar 11 '10 at 18:53

So there's a few things.

  1. Distance, by your comment it's 400ft (~130M), this should be ok with any SX transceiver
  2. Patch cables, also by your comments I think you'll need to purchase new ones, probably LC-ST. Here's an example
  3. Installation cable, the cable used on the main run, if it's 50/125 (OM2) no problem, if it's 62.5/125 (OM1) then it might work, but isn't strictly to spec
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  • I've seen gig run over really long runs of multimode, on the order of almost a kilometer. What the spec says and what you can do if you need to and don't have the money to pull new fiber are two different things. considering that 2 sfp modules would cost less than $100 on ebay, it's worth just plugging it in and seeing if it works. (and this was 62.5, not 50 micron cable) – chris Jun 18 '10 at 3:49

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