Need help dialing an rj45 internet socket?

Question

Computer networks

The fact is that I can not understand how to correctly ring the socket in which the LAN goes.
Everything is crimped according to the picture, the socket itself and the patch panel.
There are 3 sockets in the office, I dismantled each one and looked they were crimped in the same way as in the server room itself in the patch panel.
If you just check the patchcord, the tester shows all 8 lamps flashing in turn.
I check the socket like this test-patchcord-socket
in the server room, echoing the floor of the tester-patchcord-plug in the patch panel, and not all 8 wires are burning there.
Question ?
what am I doing wrong or what cores should burn??

Answer 1

and not all 8 lived there are burning

Check with a tester that the patch cords are working. All 8 out of 9 lamps on the counterpart should light up in the same sequence as on the main one.
Cut and crimp/re-hammer the cable from the outlet to the server room. If it didn't help and the situation is the same - the cable from the socket to the server is probably damaged, or the socket or patch panel is damaged. Try with a different socket and patch panel, or if you have some extra length, test the cable on rj-45 connectors to rule out a cable problem.

Answer 2

the easiest way:
take any electrical tester, close 2 wires on one side, turn on the current with the other tester and see if the current has passed. If passed - lived whole, did not pass - not whole. So you check all pairs, then in a non-whole pair you check each wire paired with a known working one.
Cheap and cheerful :) but it works!