Keystone ports

[sswingle]

I make lots of patch cables, but I need to wire a couple of keystone jacks. I was looking at some existing jacks, and the arrangement of the wires is totally different. There was a chart on the side with two different ways labeled A and B. Neither one was even close to similiar compared to how I would wire a patch cable.

I THOUGHT that a run from patch panel to a wall jack should be straight through. Wouldn't you just put all the colors in a row? I forget the exact order, but I remember seeing three solid colors next to each other, and then three white/color wires next to each other. Seemed quite odd to me.

Also, what is the difference between the A and B. I saw some pictures of jacks on the internet and one I saw also had an A and B diagram on it.

Next, lets say the existing jacks are....Leviton, and I buy Belkin. Can I wire them both as, say B, and they will work, or do different brands wire differently.

Finally, I notice that there are different types of punchdowns. Type 110? Is that standard? I have a cheap tool I got a while ago, but it doesn't say what type it is. I'm not too concerned about getting a better tool since I will be doing very few jacks.

Thanks for any help!

 

[imported_Paladin]

From where you punch down to the pins of the jack there are more crossovers (twists.) Follow the color code on the jacks -- they know what they are doing. Use the same on both ends. Putting all the colors in a row will split the pairs and the cable will not pass data and will give cross-talk if used for voice. (assemble a Panuit jack)

The difference between A and B is the placement of pairs two and three. The B scheme is the original Bell System Standard and thus the only one I use. The A scheme places pair one on the middle pins and pair two straddling it to match an RJ-14 arrangement.

All manufacturers follow the standards and are functionally identical. Use the same, both As or both Bs, on both ends of the cable for a straight cable.

Using A on one end and B on the other will cross pairs two and three for a 10baseT or 100baseT cross-over cable. For a 1000baseT crossover you also need to cross pair one with pair four.

The 110 punch down is fairly standard (google images will show what it looks like.) The Panduit jack linked to above does not use 110 punchdowns.