CAT 5 Cabling re-visited

uncle Bill moved to a swanky big house. the house was cabled with CAT5, but not much labeling.

all the cables go to a closet in the laundry. but there is no patch panel on this side, these is a small patch panel for telephone leads ( m-block?).

on the walls in those rooms, those sockets are not labeled. peel off the wall cover, its labeled inside. well, still can't tell which is which on the otherside.

The manager told me to use a multi-meter to measure it. To do that, cut a CAT 5 lead, and short w/Green and green, as well as W/Orange and Orange. the idea is to measure the leads on the other side.

there are about more than one dozen cables in what should be a patch panel area. to identify further, I used a cable detector which will buzz a noise louder with a match. But I found it was less effective when some phone lines are in shaunt.

wall socket: need pull out a little bit to identfy it is is T568A or B cabling. I would say some old T568 terminating sockets only type A or B. the new ones are dual-colored, can do either A or B depending which color code you using. needless to say you need use one to match the one on the wall. one annoying for me is that I often mix up which slice is which when I punch those wires like w/G or G. so A cable tester is used to test the cabling.

cabling standard T568A and T568B: the difference is green pairs and orange pairs are transposed.

T568B
1    W/ORANGE
2    ORANGE
3    W/GREEN
4    BLUE
5   W/BLUE
6   GREEN
7   W/BROWN
8  BROWN

T568A
1   W/GREEN
2   GREEN
3   W/ORGANGE
4    BLUE
5    W/BLUE
6    ORANGE
7    W/BROWN
8    BROWN