Does anybody know of standards, guidelines or recommendations that govern pairs 1 and 4 in a UTP crossover cable?
These are the two pairs than DO NOT play a part in the transmission of data in the TIA/EIA standard. The TIA standard says leave them as they are.
I teach a hands-on networking course with real hardware, and have found that some manufacturers either swap pairs 1 and 4 in a crossover assembly, or leave the pairs in their TIA defined position and swap the individual wires in each of these pairs. I can find no way to explain these variations to my students.
If anyone can help you'll be demystifying part of our industry to me as well as the students.....Thank you
May 31, 2006 7:10 AM
May 31, 2006 10:01 AM