Scott, Thanks for the expert clarification. Your input is always welcome in the BRLUG list.
John Hebert --- Scott Harney <[EMAIL PROTECTED]> wrote: > Their are two standards for Ethernet CAT5 wiring. > 568A and 568B. The > wiring scheme he listed is 568B which seems to be > the most popular. > OW-0-GW-B-BW-G-BW-B > > 568A looks like this > GW-G-OW-B-BW-O-BW-B > > The reason knowing and using the correct standards > is important is that > you buy gear such as patch panels or wall plates > that may be 568A or 568B > wired. I can't say that I've ever seen a > manufactured patch cable not > use 568A or 568B cabling. The standard is good > because you can walk into > a facility and not have to guess the color scheme in > place. > > There is another advantage to sticking to the two > standards. Should you > need to create a crossover, simply wire one end 568A > and one end 568B. > Since ethernet only travels over positions 1,2,3 & 6 > in the cable you > can see that this will result in a proper crossover. > > If manufacturers are instructing cable construction > any other way, they > are wrong. Don't believe me, search the web! > > On Thu, Nov 08, 2001 at 08:24:57AM -0600, john > beamon wrote: > > Y'know, I almost hate to mention this, in case > there are people learning > > this for the first time. I've got installation > instructions from certain > > manufacturers and some prefab patch cables that > start O-OW and end Br-BrW. > > It's totally non-critical, since both ends are the > same and the colored > > pairs are in the same positions. It's just > curious. > > > > -- > > -j > > > > On Thu, 8 Nov 2001, Kris A. Wotipka wrote: > > > > > Date: Thu, 8 Nov 2001 00:20:51 -0600 > > > From: Kris A. Wotipka <[EMAIL PROTECTED]> > > > Reply-To: [EMAIL PROTECTED] > > > To: [EMAIL PROTECTED] > > > Subject: [brluglist] homemade CAT 5 > > > > > > Here is what a friend of mine here in Abbeville > came up with. I'm not sure > > > where he learned this but he is currently > teaching the first two CCNA > > > semesters at the local high school so maybe it's > a CISCO thing. > > > > > > 1. Carefully strip the end of the cable being > sure not to cut the insulation > > > on the individual wires > > > 2. Separate out the 4 pairs but do not untwist > them. Place the O/OW pair to > > > the extreme left and the B/BW pair to the > extreme right. The other two pairs > > > can go to the top or bottom. > > > 3. Untwist the O/OW wires and straighten them > out as much as possible. > > > Place the OW to the left and the O next to it. > > > 4. Untwist the G/GW pairs and place the GW next > to the O. > > > 5. Untwist the B/BW wires and place the B next > to the O. > > > 6. Place the BW next to the B and straighten > them all out again still > > > holding the jacked firm in the left hand. > > > 7. Place the G wire next to the BW > > > 8. Untwist the B/BW pair and place the BW next > to the G followed by the B. > > > 9. Straightening the wires as you place them > provides a nicer grouping then > > > if you untwist all the pairs at once. > > > 10. While pinching the jacket with the thumb and > index finger of the left > > > hand, pull the grouping tight making sure that > they all remain in order. > > > 11. Trim them so that there is about 1/2 inch of > wires protruding from the > > > jacket. Make sure that the cut is even and > perpendicular to the jacket. > > > 12. Grasp the RJ-45 connector in the right > hand, tab down and facing away > > > from you. > > > 13. Insert the wire into the RJ45 making sure > that the grouping stays > > > together and that the clamp portion of the RJ-45 > is above the jacket of the > > > cable. > > > 14. Insert the RJ45 into a crimper and slowly > squeeze the handle and hold > > > for a ten count. > > > 15. Test the cable by gently tugging on the end > to make sure that it won't > > > come off easily. Inspect the connector. Make > sure that the grouping has not > > > changed and that the cable clamp is crimped onto > the jacket of the cable. > > > Lastly check the cable with a commercial cable > tester. > > > > > > > > > hope this helps.......... > > > > > > kw > > > ================================================ > > > BRLUG - The Baton Rouge Linux User Group > > > Visit http://www.brlug.net for more information. > > > Send email to [EMAIL PROTECTED] to change > > > your subscription information. > > > ================================================ > > > > > > > ================================================ > > BRLUG - The Baton Rouge Linux User Group > > Visit http://www.brlug.net for more information. > > Send email to [EMAIL PROTECTED] to change > > your subscription information. > > ================================================ > > -- > Scott Harney<[EMAIL PROTECTED]> > PGP Key fingerprint = 6D 31 C3 00 77 8C D1 C2 59 0A > 01 E3 AF 81 94 63 > ================================================ > BRLUG - The Baton Rouge Linux User Group > Visit http://www.brlug.net for more information. > Send email to [EMAIL PROTECTED] to change > your subscription information. > ================================================ __________________________________________________ Do You Yahoo!? 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