Quote:
Originally Posted by pabscars
What I don't understand is why it matters which strand goes in which pin as long as they match end to end.
One of my many tasks at work was to run a load of ethernet cables above a suspended ceiling from our server room to an office some 30 or so metres away.
However I found that not following the correct wiring diagram resulted in the leads I had run not working, so I cut them off and crimped on new ends following the correct diagram and it worked 
anyone care to explain why it matters which order they go in |
Each of the eight wires is paired with one of the other eight, this gives four pairs, each pair is twisted together down the full length of the cable. This makes the "pair" less susceptible to noise from the other three pairs(called crosstalk),and also outside noise sources. It also helps stop the "pair" radiating(or picking up) interference to anything else.
Also, following standards aids fault finding and performing future work on the cabling. Most CAT 5/6 network cabling is EIA568B.