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Protecting the LAN from lightning strikes

We've just suffered our 3rd lightning strike in less than a year. It hits a nearby building or power pole and blows out transformers. All our computers are UPS protected, but the surge isn't coming in through the power lines. It's traveling through the cat5 cable and burning out only network cards and hubs/switches. Each UPS has an RJ-45 pass-through port, but these knock the network down to 10 mbps from 100. Do you know a product or method that would protect the LAN?
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looking at this URL. Let me know if this helps! http://www.apcc.com/products/protectnet/index.cfm
 

This was first published in May 2001

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