How to find the second end of the coil in the patch panel?

Question

Computer networks

Hello. I am a relative newcomer in this area, so for anyone who thinks the question is stupid - sorry ((
So. There is an office. It has 4 network sockets. And there is a patch panel where the whole thing goes under the ceiling for 70 meters. Three sockets They work great. I checked it like this: I hung a small patch cord into the socket, hung one part of the tester on it. The second part of the tester into the patch panel. All lines responded, everything was buzzing. Question: how to find the end of that same quadruple socket on the side of the patch panel? If it doesn't go to the patch panel, where theoretically it could be connected?Of the equipment we have only a LAN tester.

Answer 1

Lan testers are different. Some have a line search function. A part of the tester with a generator is attached to one end, it generates a signal, switch the second part of the tester to the search mode, and lean its tip as close as possible in turn to all suspicious cables. Theoretically, when approaching the "correct" cable, you will hear the signal of the generator in the speaker. But:
- testers are different, some very cheap ones do not have such a function
- the generator power is different for different testers, the cables are different, the weather on Mars is different - sometimes the signal can be disassembled through insulation, sometimes - only at the cut / end of the cable, sometimes not at all
- the cable from the fourth socket can end anywhere, not necessarily in the patch panel - for example, in the wall halfway

an example of such a tester

Answer 2

Run to the store for 5bites LY-CT025, usually it costs no more than 3 thousand rubles. At the very least, it helped with the search for wiring in thin walls.

Answer 3

There is one moronic method, but in your case it can help ... So, what you need:
2 people.
a piece of patch cord with one crimped end - 2 pieces.
mother-mother adapter for rzh-45.
So, from the segments of the patch you make 2 products: on both, clean the uncompressed ends, on one you stupidly twist all the strands together, on the other, divide the ends in half and also twist them into bundles. Then one person goes to the control room, taking with him a patch with all the twisted ends, which can be immediately plugged into the adapter, pulls out all the available unknown cables, signals to the second one, who is at the outlet. The second one connects a patchcord with two pins to the connector, and measures the resistance with a conventional short circuit tester. The first alternately pokes the adapter on the available free ends until the cry "there is a contact."
A non-durable short will not kill equipment connected to a closed cable, but, of course, it is not worth leaving it in a closed state for a long time.

Answer 4

Typically, the network is built according to a typical scenario. Floor switches, patch panels in offices.
Based on this assumption, you need to plug the signal generator into the patch panel of the office, and go to the floor server room, and look at what is sticking out and check the signal.
If this does not help, we follow the bad scenario, open the patch panel, and go along the cable.