Help me settle a debate. I say, when we test this data jack it will fail. But, my partner says it will still work. Again, the horizantal pathway is all 568b. But, the patch cable on the tester is 568a. HELP?
Yes, it will work. The only difference between 568a and 568b is where the pairs are located. In 568a the orange pair are on pins 3 6 and the green pair are on pins 1 2. In 568b it is just the opposite. So as long as you keep the same pattern from end to end your data will flow properly. In your case your 568a patch cable will use the orange pair to communicate with the green pairs on either side and vice-versa. Check out the link below for some more details.
It will work and here's why the pathway is the same on both sides. the patch cable is the same on both sides network traffic doesn't care what color wire it is travelling on As long as the patch cable is 568a at both connectors and the horizontal pathway is 568b on both sides, you have a straight through path.