On Saturday 25 December 2010 08:42:52 S Mathias wrote: > Two questions that was not always clear for me [sorry for posting to this > list :\]: > > ########################################################################### > ################### > > Q1) when cabling, is the color order important? like: > > straight cabling: > A side: white-orange, orange, white-green, blue, white-blue, green, > white-brown, brown B side: white-orange, orange, white-green, blue, > white-blue, green, white-brown, brown > > could be eg.: like this?? > A side: white-orange, brown, white-blue, green, white-green, blue, > white-brown, orange B side: white-orange, brown, white-blue, green, > white-green, blue, white-brown, orange Depends. Firstly, non-standard order might confuse the heck out of other techs. More important, if you are just installing the tips and the majority of the cable is pre-made, they might be using a twisting/braiding order that minimizes noise where using the standard cable ordering. Naively, there's no problem; and using a non-standard order should work, but using the standard order is well-advised. If you are twisting/braiding your own cable, the best ordering is based how you twist/braid the wires. > ########################################################################### > ################### > > Q2) again cabling.. i know what is the color order of straight and > crossover cabling. BUT: what are the color orders, when i need to create > physically two separated networks? I don't recommend combining more than the 8 wires in a single cable when doing ethernet. Just run multiple cables and bind them together. Cross-talk between cables is less of an issue than cross-talk between wires in a single cable. However, you are correct that would be minimized by running all the wires in a single cable, IF you use the correct braiding/twisting order through the length of the cable. I know the generic algorithm for braiding N straight wires in a round cable involves primitive roots of the modular ring N, but I don't know how to practically apply that to braiding my own cable. -- Boyd Stephen Smith Jr. ,= ,-_-. =. bss@iguanasuicide.net ((_/)o o(\_)) ICQ: 514984 YM/AIM: DaTwinkDaddy `-'(. .)`-' http://iguanasuicide.net/ \_/
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