How to split the input lan cable to two RJ45 sockets?

Question

Computer networks

Good evening. How to split the input lan cable (from the provider) to two RJ45 sockets? The outlets will not be used at the same time. Made so that if you want to take and connect the router in the kitchen, and in the bedroom the pivot socket will be without connection. If necessary, I moved the router to the bedroom, and in the kitchen there will already be a pivot socket.
The apartment has a cable from the provider. The apartment is one room. Before that, I ran one two-pair cable to the kitchen for an RJ45 socket and one two-pair cable led to the bedroom for an RJ45 socket. I clamped cable 1, 2, 3, 6 in the box. And also clamped two two paired cables according to the same principle. Assemble according to the scheme in photo 0.

For connection, I used a thing with Aliexpress. Photo 1. And I connected two cables at once.

Next, I checked the correct connection using a cable test. Photo 2. Light bulbs blinked in turn 1,2,3,6. In the kitchen and bedroom sockets showed so.

In photo 3, the socket

Next, the native Lan cable from the router connected it to the lan socket and then the other end to the router, there is no signal, the cable does not show in the router. When connected to the test cable, the lights 1,2,3,6 flash. But the router is not working. Then he went to the bedroom and also connected the router to another outlet. The situation is the same as in the kitchen. No signal.

Then I went to disconnect one lan cable and after that the cable in the router immediately showed. Photo 4. Then I did the same for another room and everything worked the same way. But it was worth going to connect another lan i.e. immediately two lan cables to that thing as a network (cable) disappeared in the router.

What can be wrong ? Is it possible to strip the input LAN cable into sockets without using them at the same time?

Answer 1

No way.
The provider's signal can be only on two pairs out of four (if the speed is up to 100 Mb) or on all four pairs (if above 100 Mb). All this, God forgive me, pornography is intended for one thing - saving on the laid wire, when there are such God forgiveness "splitters" on both sides , which in fact simply bring two wires into one, letting one occasion through two pairs and the second through the other two couples. Dishmanstvo 90th level.
And this task is solved only and exclusively by buying a router.

Answer 2

These things work in pairs to connect two devices through one already laid cable, and you need to connect the router from the side of two ports, not one.

If you need to connect two devices in the absence of ports - you need a switch (switch)

Answer 3

If you need to feed the ethernet alternately to two different sockets with manual switches, then you can use this - a switch with manual switching to two ports:
https://aliexpress.ru/item/4001186433417.html

But it's better, of course, to take an ordinary small switch.

Answer 4

To answer exactly the question posed, you need a mechanical switch at the junction to manually switch the connection. Connecting two lines
to one in parallel can be dangerous for the provider's switch (you never know and leave two devices turned on at the same time) there will be unnecessary pickups (quite possibly until the network is inoperative)
but it doesn’t matter the principle is the same, there are a million variations of them, and their appearance) so that only one outlet is connected at a time, and there is no need to save, i.e. so that there are no simultaneously connected lines to both.

ps don't fool around, buy the cheapest router (since you have a line from an ISP, you need a router and not a switch)

Answer 5

the point may be that the obscure device that you bought is not designed to split one ethernet twisted-pair cable into two, but for something else.
in general, in order to connect segments of an ethernet network (i.e., devices on different sockets), a switch is used. the simplest one for 5 ports will do.
devices for, as you put it, connecting one cable to two sockets, I have not seen. apparently because everyone is satisfied with the switch.

Answer 6

In short, since
one socket will always not be used,
then I ask you to love and favor
https://www.pcshop.ru/index.php?id=17683&ymclid=16...
This is what you are looking for (all ends are crimped in a direct way) And yours stray for other purposes and not paired

Answer 7

It must be understood that such a scheme is not provided for by the standard and should not work this way. However.
There is such a necrophilic scheme from the 90s: a passive 3-port hub .