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Old 24th September 2012, 09:27 AM   #21
tvrgeek is offline tvrgeek  United States
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I too am not sure you are going down the correct path. What type of cable are you using now? CAT3? I might suggest you switch to UTP Cat5 or even move to shielded twisted pair. Fiber is immune to EMI, both reception and transmission, and it also has the advantage of preventing ground loops which may be a bigger problem than EMI. However the fiber GBIC's are not as reliable as the copper ports. If your data center is that dirty, I would look into your grounding and power for sure.

Is it the Ethernet you are trying to protect, or sensitive analog running near it? Two very different problems.
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Old 24th September 2012, 12:51 PM   #22
marce is offline marce  United Kingdom
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Without some metrics (ie measurments) of the percieved EMI problem it is almost impossible to provide a solution.
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Old 24th September 2012, 01:24 PM   #23
imix500 is offline imix500  United States
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Is one of the computers a laptop by chance?
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Old 25th September 2012, 05:38 AM   #24
ggking7 is offline ggking7  United States
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I do think I hear a difference when the two systems (one a laptop) are connected via CAT6 ethernet and not. Do these items look like they should function together so I can at least experiment with this?

one converter at each computer:
http://www.amazon.com/gp/product/B000IALOXO

this cable running between converters:
Amazon.com: Tripp Lite N506-05M 16' Multimode Duplex 50/125 Fiber Optic Patch Cable SC/SC - 5M (16 Feet): Electronics
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Old 25th September 2012, 05:49 AM   #25
RollE2k is offline RollE2k  Sweden
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ggking: i work with fiberoptics daily, in our metro network. And i can tell you, that yes - those will work together. Just remember to swap TX/RX in each side when you plug them in. Also, you maybe have to change some dip-switches on each side to have network auto detect work.
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Old 25th September 2012, 07:00 AM   #26
ggking7 is offline ggking7  United States
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Thanks RollE2k. Should I need crossover cables to connect the converters to ordinary ethernet interfaces or should I use regular ethernet cables?
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Old 25th September 2012, 07:52 AM   #27
RollE2k is offline RollE2k  Sweden
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You can use normal Cat5 cables, crossover not needed. What i meant with swapping Tx/Rx is that you have to cross the fiber patch cord between both fiber converters. (Tx from one side to Rx on the other and the other way around on next fiber)
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