Router and 4-wire ISP cable?

Question

Computer networks

Good afternoon!
I bought myself a new TP-Link TL-WDR3600 router and ran into such a problem: my provider uses RJ45 four-wire, when I connect this cable to a new router, it (the router) does not respond.
When the same cable is connected to the old router, and there is already an 8-core cable from it to the new one, then the new one works fine.
Please tell me what can be done about it.
Thanks in advance.

Answer 1

Set the port speed in your router to 100Full hard

Answer 2

As the providers themselves never use a 4-core cable, since there are always 8 cores, and good installers made 4 cores for you, I would complain to the provider about this and ask to redo it.

Answer 3

Second nah

Answer 4

It would be honest for the installers to bring an eight-core cable into the apartment, you can call those support and clarify - this is their hack or the permitted practice of the provider.
But even with 4-core everything should work. Look how it is pressed: take the jack and look at the tracks, the correct pinout is 1,2,3,6 contacts
http://goodhomejob.narod.ru/lvs/5-13.gif