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happyscrub

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Why don't modem use my new ethernet cables?

I got an Arrius modem from cox a while back. It came with a cat5e cable to connect to my computer. It works perfectly. Other cables don't work at all.

1. If I connect my modem to computer with cat5e cable - it works

2. If I connect my modem to router with cat5e cable - it works

3. If I connect my modem to computer with cat6 cable - it doesn't works

4. If I connect my modem to router with cat6 cable - it doesn't works

Is it possible my modem won't accept cat6 cables? What gives? The cables are new. I bought like 3 cat6 cables and none of them work.

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Andrew_Wees

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maybe the cat6 cables are bad

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happyscrub

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They are brand new. Bought at different times

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Bruce

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Do you have a link to a website for the cables?

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Bruce

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If Walmart sent you an UTP cable, it should work.  I suspected a grounding loop with an STP or...just stabbing in the dark...a crossover cable.

Did these specific cables work with your previous modem?

Are you sure Cox sold you a CM8200A modem...as opposed to a CM8200?  The model A has 2 Ethernet ports but Cox would only assign 1 IP address.  You're not trying to use the second port are you?

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