How to draw a network cable diagram in an office wall?

Question

Computer networks

There is an office, renovated about ten years ago. A twisted pair cable is laid in the walls from the switch to the sockets (two sockets approximately every five meters, about 30 in total). Of these, only 16 are connected to the patch panel and only ten are working.
There was a need to repair the faulty ones and connect the unconnected ones (and to compile an explanatory description of all this horror). There is no documentation at all. The tags are either insane (cable number 6 is plugged into the 10th port of the patch panel and corresponds to the 26th socket), or they are completely absent.
How to implement all this without breaking the walls? The budget is limited only by common sense, tk. The management is not happy with the current situation.

Answer 1

A banal cable tester or a multimeter that is cheaper than a tester, it is better to take it with a squeaker so as not to look at the scale at the moment of short circuit. Well, you also need a connector with crimped and shorted pairs for the multimeter (we insert it into the socket), we are looking for this socket from the side of the switch or patch panel.
Both the first and second will help to find torn pairs, if any.

Answer 2

Improvised means can determine where the cable goes, breaks and confusion in pairs, but it is impossible to determine cross-pair interference or too much signal loss. If you want to be sure of the quality of the network, then you need to conduct a complete test of the cables. Equipment for it (for example, cable analyzers from fluke) has a price of tens or even hundreds of thousands of rubles, so it’s cheaper to find a company that already has such equipment and agree on a test after putting things in order in the cabling.
In general, it may be easier to run a new network in wall boxes than to deal with an old one.

Answer 3

If everything is so complicated, take Legrand's boxes, sockets, frames, etc. and lay the network on a new one. At the same time, place the sockets where they are needed (if you place the box horizontally along the wall, you can also move them if necessary), add them where they are missing, etc. And the old ones - just cut off the protruding ends and forget. You can even leave sockets in the walls (so that there are no holes or replace them with electric ones, if possible).
At my current place of work, I did just that, though there are not 30, but almost 200 sockets and the situation was much more complicated.

Answer 4

There is a well-established term - "ring out") With the help of improvised means, you can do this with a pair of laptops and a switch, a multimeter (check for a short circuit), a LAN tester. But then you have to look for a cable in the wall, from the means for this there are magnetic field analyzers (although they often lie), hands (we tap in search of voids in the plaster) and a head (we look at the diagrams for suspicious designations of ventilation shafts, risers, low currents, telephone crosses, etc. .d.)

Answer 5

You need a Lan tester with a tone generator, on the one hand it is inserted into the socket and the necessary cable is monitored with a probe receiver.

Answer 6

Do you think it's horror? Buy a tester like www.nix.ru/autocatalog/net_cables/TRENDnet_TCNT2_N... a tester in a patch panel, and with a remote module run through sockets. There should be no active devices at the other end of the wire, you can burn the port with a tester.