Using an RJ45 Splitter for Connecting a Computer and Console with a Single Cable: Pros and Cons

Question

Hello. The situation looks like this. I have 2 devices in my living room that I want to connect to the network - a computer and a console. The problem is as follows - I only have 1 cable pulled. At the moment, pulling a second one is the last resort for many reasons. Will such a trick work:...

askr · Accepted Answer

If the network is 100 Mbit / s, you buy such splitters, connect at the beginning and at the end of the cable (of course, after separation you need 2 ports in the switch) and it will be ok.
If it's 1 Gbit / s, forget it. I need all 8 cores.

jimasek · Accepted Answer

This is not done in professional installations. You can do it at home The same will work for PLN 4 and there for PLN 20. Good luck.

MrMajst3r · Answer

100Mb network. These cheap distributors are enough, do I have to buy some professional ones?

askr · Answer

If you take the scheme rj-45 and cat 5 cable, you have a crimp and some time you will make such a splitter yourself.

MrMajst3r · Answer

Well, you can do it yourself, I understand that you mean the separation of the cable into bundles of 2 pairs of wires and mounting the plugs?

Unfortunately, I do not have a crimper and the cost of the splitter is lower

Although I will ask my friends.

Thank you for your help.

askr · Answer

The cheapest spec cable crimper in Poznań is PLN 16 ... It pays for itself when you buy the first ready-made cable in the media market

jimasek · Answer

I would be careful with these cheap crimping tools, because you can hurt yourself and not tighten the RJ.

askr · Answer

I will say this, I have one, it is already 3 years old, she tightened maybe 30-40 cables and ... even if it was to fall apart now, she earned a living.

jimasek · Answer

Okay, I know what's going on, I had a few of them but I used them a little more, never again in my life

askr · Answer

When I worked in the industry, I had a business one, I don't remember what brand, but for well over a hundred ... and the fact you could feel the difference; d

MrMajst3r · Answer

I bought 2 tees, connected it and unfortunately it does not work. The connection seems to be (the LEDs are on) but when I ping I get the message "request timeout", moreover, when I connect the distributors, I lose access to the Internet. There is a connection, but the pages are not loading.

I connected according to the instructions - I have 4 ports in the router. The first one goes straight to the PC, I connected the second and third to the splitter, the cable runs, the second splitter and from there to the console and to the second PC.

askr · Answer

how do you connect individually it works?

adamz74 · Answer

Why is the ISDN password in the product description? ISDN BRI uses par 4-5 and 3-6 by default, and ethernet 1-2 and 3-6 ...

The splitter diagram is as follows:
Using an RJ45 Splitter for Connecting a Computer and Console with a Single Cable: Pros and Cons

Using an RJ45 Splitter for Connecting a Computer and Console with a Single Cable: Pros and Cons

(https://www.elektroda.pl/rtvforum/topic110642.html#532275).

If there's something else, it won't work. The "link" LEDs are on on both sides of the connection (router and PC)?

Greetings!

MrMajst3r · Answer

This was an example link.

I bought such tees:
Using an RJ45 Splitter for Connecting a Computer and Console with a Single Cable: Pros and Cons

EDIT

He, I connected everything again, i.e. disconnected and plugged in the plugs. In addition, I set all devices IP rigid, not via DHCP and it looks like it works now :)

It seems to work, but only 10Mbps ... It is impossible to make it 100?

Bogdanbenek · Answer

See here I do not know if you have a Rj 45 adapter if you have it, you can do a wire, it is known that contacts 1,2,3,6 are used in Rj45 and contacts 4, 5,7,8 are not used, I did the test, I pierced the cable and used the 1,2,3,6 contacts and I had the internet on the computer, so with the 4,5,7,8 contacts I only fitted the next plugs as 1,2,3 contacts 6 and on the 8-core cable I had 2 RJ 45 plugs on one end and 2 Rj 45 plugs on the other and this way I could connect 2 computers, e.g. with one cable

MrMajst3r · Answer

I don't have a crimper to make such a freak.

All in all, I decided to buy a new gigabit LAN router so I won't be able to separate it. By their nature, they'll just switch the cable, or I'll sacrifice a weekend, disarm half the room and pull the other wire.

piterus99 · Answer

You can always add a switch and separate it as you need to.

Bogdanbenek · Answer

That's right, you can also try to add a switch and it will be without breaking any walls and no dust, or doing something like that, but you should have a RJ45 crimper, but that's another story

MrMajst3r · Answer

Hello, after a long break. In the meantime, I detected a fault with one cable that disturbed my entire installation

The cable is properly wired, but it still does not work as it should.

The LEDs on the router are lit, but the connection is not as good as pinging. All
straight cables, not scratched. What else could be wrong here?

Bogdanbenek · Answer

Yes you have connected as in the picture.

MrMajst3r · Answer

Just like in the picture. All straight type cables.

Bogdanbenek · Answer

The numbers 1,2,3,6 are the designation of the contact used in the RJ 45 plug to transmit the Internet from the router to the computer, e.g. On these 1,2,3,6 in the RJ45 plug must be well at both ends. On the other hand, the contacts 4,5,7,8 are not used for net transmission, for the test I wired a 4-wire telephone cable to RJ45 and it was ok! . However, in my photo, this white cube is a RJ 45 speaker, you described it as a splitter in your drawing.

Using an RJ45 Splitter for Connecting a Computer and Console with a Single Cable: Pros and Cons

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