Tracking down a "miswire"
Posted on 2006-06-05
ok, this one has me stumped.
cat 5e cable runs from server room to an office through the ceiling. in the office, the cable is terminated using B-standard. i have wired this termination at least 4 times now, so i'm 100% positive the wiring is correct.
at the server room end, the cable goes to a patch panel. i have wired the port on the patch panel 3 times now, and i am 100% positive i have it wired correctly.
i connect a patch cable to the patch panel, and connect one end of a cable tester. in the office, i use another patch cable and connect the other end of the cable tester. the cable tester flashes miswire on 1-2, 3-6.
i have tested both patch cables independently, and they are not miswired.
i have taken the terminator off the end of the cable in the office and created a circuit by stripping the covers off the wires and twisting each pair together. i then go to the server room and test for continuity. the continuity PASSES. to verify, i untwisted one pair in the office, and continuity fails (as expected).
so, the cable itself is ok.
i replaced the terminator on the end of the cable in the office with another terminator to verify it is not bad. the problem still exists after swapping out the terminator.
the only thing left in the path is the actual patch panel port itself. i am now wondering if there could be something wrong with it. i did all of my troubleshooting on port 1, but port 2 is also giving the same error. there are 12 other cables that are running through the ceiling and have the same wiring at the patch panel and at the terminators, and these runs are working fine. tomorrow i am going to try to rewire the cable at port 1 to another port on the patch panel. i still have another 10 or so open spaces on the patch panel, so i will try moving the cable going to port 1 over to the next free spot.
is there anything else i could be missing here?