Question about network wiring

Noob_DIYer

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Jun 2, 2015
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Hello All

I had a question for network wiring that I was working on in my house. My setup looks like this.

Comcast input co-ax cable connects to modem (in basement) at a box where there are CAT6 network wires terminating.

A CAT6 male cable connects to the modem that opens to a female connector in the kitchen placed on the wall.

At the Kitchen, I will be placing an apple router. A CAT5e male to male cable is being used to connect the kitchen female wall plug (where it is receiving from the modem) to the router input. When I try to do so, I notice that the router does work.

However, when I connect the router directly to the modem (via a regular CAT5e male to male cable bypassing the kitchen wiring), it works perfectly fine.

For the wiring between the basement and the kitchen wall, I checked the male and female ends and found that the builder used 568A standard (as per some googling to see how 568A wires are connected).

My question here is - do I need to use a cross over cable CAT5e/CAT6 (stranded with 568A scheme) to connect from the wall to the router to make the router work? Or, is there something with the compatibility of CAT5e and CAT6 cables that will not allow this to work?

I am a little new to this DIY and networking thing, and if I have missed out on some critical information, please let me know. If you need some snaps from the setup, I can attach those if those will be needed to debug and help me.

Thanks.
 
Solution
the only difference between 568A and 568B is the colour schema. if both sides are done properly it should still work.

compare the network connector of the CAT6 with the one form the CAT5 cable.

the only thing that should be different is where the green and the orange pair is connected, they are switched.

if you could get some pics of the CAT6 connectors so one can see the wire colours, that might help.

the only other thing is use a cable tester to see if it is wired correctly.
the only difference between 568A and 568B is the colour schema. if both sides are done properly it should still work.

compare the network connector of the CAT6 with the one form the CAT5 cable.

the only thing that should be different is where the green and the orange pair is connected, they are switched.

if you could get some pics of the CAT6 connectors so one can see the wire colours, that might help.

the only other thing is use a cable tester to see if it is wired correctly.
 
Solution
Crossover shouldn't be required in this case. And there's no electrical difference between Cat5e and Cat6 (the twists in Cat6 are slightly tighter, and there's a plastic divider in the center of the cable to keep the twisted pairs separate). If you have more network cables, try new cables at both ends. It could be one of the cables is bad.

If the cables are ok, it sounds like something is mis-wired or there's a break in the in-wall cable. If you know someone with a network tester, borrow it. Or if you plan to do more stuff like this in the future, you can just buy it for yourself. They're not that expensive.
http://www.amazon.com/TRENDnet-Network-Cable-Tester-TC-NT2/dp/B0000AZK08

If you don't want to buy it and have a multimeter, you can do a connectivity test for the cost of a network cable. Cut the cable in half, strip the wires, and twist the colors/striped together. i.e. twist orange and orange/white together so their copper is contacting, twist green and gree/white together, etc. Plug this half-cable into one wall port.

At the other wall port, plug in a regular network cable, then set the multimeter to connectivity test and touch the leads to the copper conductors at this end. 1/2, 3/6, 4/5 (the very middle), and 7/8 should yield a good connection.

Even if there's conductivity, another mistake I've seen contractors make is they assume network cable is like phone cable. They wire one set to every outlet in the house, when it can only be point to point.