On Tuesday 18 November 2003 15:36, Derrick 'dman' Hudson wrote: > > Why are twists so important and why do the faster technologies need > more twists in the cable? As an electric signal varies along a pair > of wires, a magnetic field around the wires is created and then > collapses. This field will induce a current in another wire that > passes through the field. That induced current is "noise", because it > intereferes with the electric current (signal) that is intentially > being sent over that wire. Twisting the wires reduces the size of the > generated magnetic field, and also reduces the cable's ability to pick > up a signal from a nearby magnetic field. > > For voice-grade telephone, no twists are needed most of the time. For > better signalling and less noise, get more twists. Using Cat 0 or Cat > 3 should be fine, but the Cat 3 will cost more money. You *may* have > noise problems with Cat 0 which will hurt your ability to connect, > maintain a connection, and will limit transfer rates. Basically "more > is better" when it comes to twists, but also "more costs more". It's > up to you to find the desired return-on-investment for cable quality. > > HTH, > -D
Thank you very much for the discussion on twists, I have a question..what about actual wire size..cat 3 and 5 are usually 22 or 24 guage..suppose one was to use say 18 guage speaker wire..it's twisted(like cat), it's unshielded(like cat)..but a bit larger..less resistance is my thinking..where am i wrong here..not enuff twists perhaps? Thank you all very very much for your time.. Lee -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
