EIA/TIA-568A and EIA/TIA-568B in networks
Posted on 2005-04-29
Somewhere I got it drilled in my head that a 568A terminated cable will not work in a 568B network.
The other IT guy argued with me for a little bit and we decided to bet a couple of doughnuts on who was right.
We created a 568A cable and plugged into a computer and a hub, which connected to a switch with the rest of the 568B terminated network. All cables but this new one was 568B.
Well, two doughnuts and my confusion later I have yet to figure out how I got that stuck in my head. We had no problems talking to any computers on the hub or over the switch.
I read that if you terminate a Cat5 it doesn't matter how the colors or wires are as long as they are the same on both ends. However, their is performance lost and you may not achieve the speeds the cable can provide if you don't use 568A or B. I know a cable terminated with both 568A and B is a crossover cable. I just can't figure out where I got it that A and B are not compatible on the same network.
I guess my question is: Is their any harm in mixing an A and B network? If not, then what about a cable with a random pinout on both ends?