How to find out how an RJ-45 socket is wired without taking it apart?

Question

network hardware

The installer installed and wired the RJ-45 sockets, but did not crimp the other ends (which should go to the router). I've tried the standard A and B charts, but neither works. The problem is that the sockets are inside the furniture drawer, and it’s impossible to get and disassemble them :( Is there a way to understand how the socket is divorced with only the other side of the wire on hand (without re-compressing all possible options)?

Answer 1

IMHO it's easier to disassemble and crimp correctly, because it's not a fact that it will work normally according to the scheme that is crimped there.
and so you take a multimeter for dialing, pull the second cable from the cross to the socket, on the cross you connect all the wires by color, and call where which

Answer 2

Yes, you can call manually as suggested above, or use the FLUKE NETWORKS CABLE TESTER
. You did not take into account the option of incorrect marking, maybe you are checking the wrong cable? And the FLUKE NETWORKS CABLE TESTER can help with this too. And find and mark especially if there is a set of beacons.
Came out just like a COE answer.

Answer 3

It was a VERY long time ago - I translated the network at the enterprise from a speed of 10 to 100. At 10-ke everything worked, at 100-ke there were no cables. Called - everything is OK. An autopsy showed that part of the sockets and wires were crimped BO-O-BZ-Z (!!!) -BS-S (!!!) -BK-K. That is, at low speed, not through twisted pairs, communication was still going on, at high speed - no.
Conclusion: no options, open all sockets and re-compress. It is highly likely that the wires are disconnected, do not understand how, and still will never work.

Answer 4

Calling - plug a piece of cable into the outlet and connect the wires one by one, and on the other hand find them. And there are special tools that themselves will find which wire is which.

Answer 5

Yes, disassemble the socket and look at the order of colors, it's not difficult.

Answer 6

the installer could be non-searching, and generally compress stupidly in parallel. Theoretically, I could even compress all sockets in different ways.
Need any twisted pair tester. You can also use batteries with a flashlight at the extreme, if you don’t want to disassemble the outlet. But in theory, all sockets should be disassembled without problems to the level to see how compressed.

Answer 7

They write correctly here, no multimeters are needed, a standard cable tester with a line of LEDs is enough, as well as a short patch cord, crimped according to the 568V scheme. The far end of the tested line must also be crimped to 568V.
But they don't write how to find the mess. And you need to do this (and one approach to the problem outlet is enough).
We stick this patch cord into it, and turn on the tester cable and carry it along the ends of the tested line. If the socket is also wired according to the 568V scheme, then the LEDs on the passive part of the tester will flash in the order of their numbers. If the wiring in the outlet is different, then the order of LED flashes will be violated. Having written down this order, it is not difficult to decipher how the wires in the outlet are mixed up. And having deciphered, it is easy to correct the order of the wires when crimping RJ-45 at the far end of the line.