Cat6/net work question
 

I wired my house with Cat6 cable. I bought some ends and a crimper. From botom to top, tab on the back I did wht green/ green / wht brown / brown / wht blue / blue / wht orange / orange. They are matched on both ends.

I have a Acer net book that when I plug the Ethernet line in I get an IP and green lights on the back of the router. If I plug in a Panasonic bluray or the WD TV live Plus I just bought I get nothing. I switched plugs in the router and that does not affect it. I ran double lines of Cat 6 and I get the same result on both lines.

Is there a difference between Cat 5 and Cat 6 that would cause this problem? They are both 8 wire cables and the connections are both 8 wire. Why does the PC work and not the other two devices? I made a shorter cable to run from the desk top to the router and it works fine as well and this thing is 6 years old. The cables I am having problems with are about 70-80 ft long.

Edit:

I forgot to mention that when I hooked up the WD TV device to a 5 ft store bought Cat5 cable it worked fine.

It would seem that the order of the wires makes a difference. I did a search for cat 6 images and I had the wires ion the wrong order. Even though I had them matching at both ends it did not work.

Does anyone know if there is something different about the strands of wire in a Cat 5/6 cable? They all look the same diameter and composition but I guess looks can be deceiving.

the only difference between cat 5 and 6 is how tight it is twisted. sounds like your tv requires a crossover cable and you terminated them as strait through. most computers now days can swap the pairs at the computer end on its own. look up cross over vs strait through.

Nope. I made them as a straight through. The original set up worked for two lap tops and a desk top. They would not work on my bluray or WD TV Live. Nothing made sense so I decided to redo the RJ45 connections. The originals were set up in pairs wht orange/orange, wht blue/blue ...etc The new ones were set up in the pattern below. http://www.home-network-help.com/ima...over-cable.jpg

In both cases it was set up as a straight through just the order of the colors was changed. I have no idea why that would make a difference but apparently for some reason it does.

For some reason, your picture has "A" and "B" switched. From the conductor side (tab away from you) a "B" wiring schedule is wo, o, wg, b, wb, g, wbr, br.

For work, I wire everything with a "B" wiring scheme unless the equipment or customer specifies "A". Here at home, everything is "B" and that includes computers, blu-ray, TV, Tivo, etc...

The colors have to be ordered in such a way that the signals are carried on matched twisted pairs. That's why just any old scheme won't work, even if it's consistent end to end.

Kartek, from hence forth I'm calling you "Captain Audio Video" :D

Yea, I posted the wrong picture. I used A in my new set up. I know you are right in the specific wiring scheme I just do not understand why. If it consistent end to end, who does the component know what color the wire jacket is?

The difference between CAT5 and CAT6 is that in CAT6 the pairs are not twisted the same, so they differ in length. This reduces interference and allow for higher speeds.
With long cables you can get timing issues with CAT6 cables and CAT5 devices.

A solution is to use a switch between the CAT6 cable and the CAT5 devices, switches are auto sensing an adjust for 100/1000mbit

IF you get no signal at all there is probably a wiring problem.
This site gives a good instruction The Internet Centre - Ethernet Cable - Color Coding Diagram

Investing in a simple cable tester is always a good idea.


Rob