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wiring help

wondering if someone could help with a problem.i ran some cat5e cable in my office from router up the wall through the attic then down to other computers i think my longest wire run is about 100 ft. and not a single one of the three wires works. it tells me that a network cable is unplugged. router is working ends are crimped on right. if you have any suggestions they would be greatly appreciated. thank you

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Did you make your own plugs?

How did you connect the RJ-45 jacks to the wire. If you reversed or miss-pinned any of the wires it won't work.

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What are you plugging in?

What are you plugging into what?

PC to Switch or Hub, straight through.

PC to Router crossover.

Switch or Hub to Switch or Hub crossover.

Router to Router crossover.

Did you make your cables straight or crossover? What are you connecting together whith the newly run cables?

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How to wire CAT5E cables
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This old thread.

It's from 2005 so it's locked.

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