Strange twisted-pair connector pinout Why?

Question

Computer networks

Good evening! I came across the following twisted-pair crimping scheme (I asked my acquaintances to re-crimp because there is no Internet, the connector loosened) The speed from the provider is 100 Mbps.
Scheme:
1) white-brown
2) brown
3) white-blue
4) green
5) white-green
6) blue
7) white-orange 8
)
orange
a couple according to scheme B.
Tomorrow I'll go and see how it looks live.
The initially familiar wire did not re-compress 100%. So the provider started.
What could be the reason for such an interesting scheme?

Answer 1

By and large, it is not very important how your connectors are crimped, the main thing (in the general case) is that they are crimped equally at both ends.
I somehow got a job in one office, there before me two guys crimped patch cords, each in his own way. They wrote instructions, it shows who is crimping in pictures, so that you can find the culprit, if anything :-) Then for a long time I picked out these patchcords from the network.

Answer 2

I'll explain. As a rule, subscribers are connected to 100 Mbps. This requires 4 wires. Therefore, the other 4 go to the next apartment.
So, if the first uses two pairs of orange-green, then the second uses brown-blue.
1,2,3 and 6 pins of RG-45 are used for 100 Mbps, the rest of the pins are not overcompressed or not.

Answer 3

The initially familiar wire did not re-compress 100%. So the provider started.

Some last mile providers suffer from this garbage. They fuck up some of their cunning crimping system. It varies from provider to provider.

What could be the reason for such an interesting scheme?

So that when some smart guy climbed with his cable crimped as standard, nothing came of it. A type of defense through obscurity.