How to connect three cables with two twisted pairs?

Question

Computer networks

I'm doing the Internet in the house, I ran into the problem of connecting twisted pairs. In the wall I have a cable with only 2 twisted pairs. The Internet is carried out by a separate cable. A patch cord goes from the operator's modem through the bridge mode to my router. A patch cord goes from my router through the LAN port to the outlet. Next, in the shield, I need to connect the cables so that the Internet goes further into two sockets. The first question is what equipment do I need for this? Preferably specific. The second question, how do I need to connect two pairs in RJ45 directly or cross? If you say the order lived it will be generally wonderful. Attached is an example diagram.

Answer 1

Auto MDI / MDIX switch, plug all three two-pair cables with straight wiring into it.
You are now trying to build what is called a "wiring closet", there are two types of equipment in them: patch panels, to which cables are routed from sockets to an RJ45 female connector, and local network organization devices (switches, hubs, routers, that's all ). Accordingly, at least for a local network, you need a switch / hub (specifically, they don’t make hubs now, they are outdated), into which you need to plug all three cables using RJ45 male connectors.

Answer 2

You need a switch. Enough five-port 100Mbit, such as D-link DES-1005C or TP-LINK TL-SF1005D. Gigabit on two pairs you still can not get.
Layout A or B, direct or cross - for modern switches it is not critical, they are all with AutoMDX. For a two-pair cable, orange and green pairs are used.
According to the standard, sockets or a patch panel are also placed near the switch, which is connected to sockets at workplaces with a single-core cable. Sockets with a switch and terminal devices are connected by patch cords to a multi-core cable.
But to reduce the cost, often near the switch they simply crimp a single-core cable with a plug.

Answer 3

as a variant of collective farming in the days of expensive pieces of iron, passive hubs were made to combine three cables . it has several pitfalls, such as limiting the range of the segment, but the scheme works.
Now it is more efficient to take a five-port switch. better faster more efficient, and it costs a penny and used Avito in bulk.

Answer 4

Any 100 Mbit unmanaged switch in the shield
Or another router in access point mode