How to Use an RJ45 Splitter/Combiner
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- เผยแพร่เมื่อ 7 ต.ค. 2024
- Sebastien demonstrates exactly how RJ45 Combiners work, and explains why you need to use them in pairs:
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9 years and still no other TH-camr has come with a simpler and clearer explanation. Thank you.
It's 10 years now
10 years and 9 months now.
However friendly and accessible, it was an awful explanation.
1) The RJ45 combiner/splitter is used in conjunction with 8-wire Cat5+ cables;
2) It works by effectively degrading the Cat5+ line to a pair of 4-wire cables;
3) where you could have achieved 1000 Mbps for a single connection over the Cat5+ line, with a combiner/splitter properly connected on each side of the Cat5+ line, you would be able to have 2 separate 100 Mbps connections.
2 connections, but 10 times slower. Ya gotta really want to avoid running the additional Cat5+ line or using a network switch.
13 years now
Its 13 years now
12 years ago still the simplest explanation I come across with.
Didn't know how signal cables could be so tricky (SO different from splitting electrical current). Lucky for no reason I purchased TWO combiner/splitters online but was very upset it didn't work the way I wanted until watching this video. Thanks, much appreciated. Brilliant, clear and simple demo saved my day.
This is a digital signal, not an analog one. That means that the information is travelling in 0 and 1 bits form, and that cannot be split into 2 unlike an analog signal like electric current for example, which splits the electrons to flow in 2 directions.
Same luck lol. Ordered two without the knowledge that having two is required. Still waiting for it arrive actually.
I hv checked 8 other vids before you and u gave the best best best explanation in 2 mins. TQ so much.
this was exactly what I was looking for.. thank you Sabastian wherever you are.
Literally I was thinking the same....that splitter at just 1 end will split the network...but this video has made it all clear...
You just saved me an incredible amount of time and stress this morning! Now I can just toss a second one on the shopping list and get on with the rest of my day.
this worked well. my setup> cablemodem & switch -> splitter -> long line -> combiner -> router & line 1. line 2-4 are for my main systems, line 1 is rerouted back to the cablemodem and swich which is by the tv so i can connect other things on that end.
This video really helped me a lot .. Thank man
You're welcome!
wow, visual aids makes it way easier to understand😊
Hello, it is 2019 and it was VERY useful, I am looking for 1 month ago how to connect 2 pc in my bedroom without bringing another Rj45 cable, I bought a spliter and I did not understand how to make it work so far, I will buy another one since its cost is very low and I will put it on the router with 2 LAN cables, thank you very much and sorry for the google translator, I live in Uruguay
Many thanks, I was confused when I plugged the splitter at the end of my cable and used the "splitted cable/s" on my machines which didnt work.
Thanks for the simple explanation!
thank you very much for the explanation.
Thankyou I now understand how it works
THANK YOU i have been trying to get how this works until this fantastic video i didnt know
Glad to have helped!
Thank you so much ! I was wondering its usage, you made my day
So that's why I couldn't use it to split internet to 2 different PC's! Thanks for explaining!
This seems to be a point of confusion for a lot of people. We try to clarify it as much as we can. Glad to have helped!
This is a pretty sweet solution if the cable in the wall is Cat5 with 8 threads (supports gigabyte Ethernet). when you use the splitter 4 threads are used for each device which means a maximum speed of 100 mb/s which is usually good enough for most uses
Great, now I understand, and it makes much more sense to me. However, I am wondering why resellers aren't selling it in pairs, I got my splitter single via Amazon and no mentioning what so ever that 2 will be required.But yeah if something was split up, it must be combined again... Thanks for your short video + explenation
+Anes Lihovac Thanks for the feedback! I'm not sure why other resellers sell it singly, unless it is to draw customers in with a lower price. We've had enough complications with these items that we now sell it as a kit so people are aware of the need to use it in pairs.
6 years later Ebay and Amazon are still selling this singularly without explaination, I have to wait another day for another rj45 combiner to arrive now and pray this method works haha...
Perfect, just what I needed
To shed some light on what he said: 4 out of the 8 wires in the cable carry the actual data. 1 pair for Transmit (Tx +/-) and 1 pair for Receive (Rx +/-) . The final two pairs in a 4 pair ethernet cable are usually split into 1 pair for Ground (GND +/-*) and 1 pair for Accessory (POE, power of ethernet, usually).
What these splitters do is take one cable (the one between the wall plates in the video) and put two whole sets of transmit and receive circuits into it, by cutting out what would normally be a ground circuit and the accessory circuit and putting them to work as an additional Transmit pair and Receive pair. That's why you need one splitter on each end. The network device (switch in this case) is only really built to 'see' one set of transmit and receive pairs on each of its ports.
* Ground does not have a polarity, the reason you work in pairs is to create a loop between the two connected devices so electricity can flow. Don't think of the +/- as polarity, just that for any given function that a pair can provide, you need two wires connected to complete the circuit.
great explanation of this. I did the exact same thing out desperation needing to adding a new computer to an workspace, but I did not use the splitter/combiner just shared the unused TX/RX signal (this was 15yrs ago) lol.
This explains it. I was aware that 10/100 only uses 2 wire pairs out of 4, and suspected these would be wired that way.
However it strikes me not as a solution for gigabit, as that uses all 4 pairs each in bidi mode.
@wolverex It is stated on the actual product page on our website that it supports up to 100 Mbps.
Wish i found this sooner
Thank you. You open my eyes.
Thanks! That was quite helpful! cheers
I am so dumb that does not look back to a 9 year old video tutorial on how it works first before buying one :( haha Now I know that I need two of this to function properly but that's another cost for shipping fee :)
Extremely helpful video.
Thanks for explainyng how it works! Great explanation!
Glad you found it informative! Thanks for letting us know!
Thanku sir for the great explanation
Excellent explanation. Thank you so much
hi thanks for the good explanation now i understand how to connect my 2 lap tops to my internet router
appreciated,i couldnt figure out why only one socket worked
Thank you so much : )
Thank you for the explaination
Thank you!
Thank you!! :)
great video
Thanks, we're glad you like it!
Muita boa explicação thank you
merci,video courte et tres bien faite.
Thank you for this video, very helpful!
thank you
Very helpful. Thanks!
thanks that explained it well.
@CableOrganizers I have a pair, one connected with to cables to the computer and the other splitter connected into 2 computers. I know its a splitter, but i don't know if its a splitter/combiner. If you search "rj45 splitter" on google images you will see it on the 4th picture.
thanks 👍🏻
@klwc Unless you know for a fact that the first splitter is a splitter/combiner, then you may not be able to combine the two signals. Only using a pair of splitter/combiner will allow you to combine the two signals over the single cable, and then split them back for the two computers.
Thanks, was about to buy a splitter to avoid getting a router for my grandparents house because all they have is a modem and they wanted to have their tv and phone hooked up to the internet.], and a modem only has 1 output slot.
Thanks!
I am doing exactly what it indicates in the video, 2 connections from the modem with a splitter and two connections to the other end and the same thing continues, it only allows 1 cable and not both, which I should check.
Thanks Sebastien, no instructions come with the product and I was wondering why they were sold in pairs at Radio Shack. Problem solved.
Ethee Wheelio, we can't respond directly as yours is a linked comment, but with the information you've given us we can only speculate on the issue. Remember, this splitter/combiner is mainly for conserving the amount of cables you need to use over a substantial distance, so rather than splitting one signal over two cables, its purpose is two combine the signal from two cables into one, then split the signal again across two cables (using a second splitter combiner at the other end of the run). You need two splitter/combiners for this to work.
I am glad I came across this video because I initially assumed that I could plug the splitter into my BT hub and then plug to computers into it, I now know this isn't how it works. So my problem is as follows, I have four connections on the back of my BT hub, so I can plug four computers into it. Up until a couple of weeks ago I didn't have any problems. However I now plug my sky television box into the hub to get more functions. So I've had to unplug one computer. I was thinking about getting some kind of wireless network adapter, however it would be much easier if I could somehow use some kind of adapter that allowed me to plug to computers into one socket on the back of the hub, is this possible in any way?
The speed for each of the signals would still be a fast ethernet speed (100Mb/s) right?
@mindfull777 You would need to have a second cable plugged into the router, then use one of the splitter/combiners to "combine" the signal into one cable and then split the signal with the other splitter/combiner just before the two xboxs. Or you can try either a switch or just have a second cable go from the second xbox directly to the router.
Why we need to add the splitter in router? If there is the one ethernet cable from router goes to split the signals in other end in two cables.
Bro thats insane
Hey, i have a problem with this kind of connection. I connected one of the Rj45 Splitter with 2 little ethernet cables i made (i tested them and they work fine) into the router, and in the other socket of the splitter i connected one large cable to another room, in that end i connected another splitter and connect 2 computers into that splitter. But both computer says identifying network but nothing happens. My splitter have another rj45 socket instead the r45 cable as yours
@princepalllav - No, as mentioned in previous replies, this product is not meant to create a network. You would need either a switch or router to have both a laptop and desktop share an internet connection.
If cannot share internet connection, then what is the purpose for this splitter?
10 years have passed, I guess he should afford to get 2 laptops by now.
Hey! Thank you for this. Do you know why my router isn't identifying the LAN connections? I've plugged two cables into the splitter and these two into the router, another single cable through this splitter and the same at the other end and plugged the final two cables into my PC and PS5 (2 cables - Splitter - 1 cable - Splitter - 2 cables), but I can't make it work. When I plug just one cable (without splitters), it works just fine. Do I need to configure something through TPLink? Thank you.
Hi, I wired my setup up exactly like this, but it doesn't work, only one of the final outputs ever works. I don't have a gigabit switch and I'm using a cat. 5e (8 wire) cable in the middle, any only ever use one of the end devices at a time. Any idea what the problem is? Thanks
@CableOrganizers Not exactly. I get an error if i post a link on here, so if you search on google images, "rj45 splitter" you will see my splitter on the 5th image (it looks like a phone splitter but it isnt)
In the first i have to cables to the router, on the 2th 2 computers but in between
one large cable connecting one to the other.
Are all ethernet cables compatible foe this method? Or is there a specific cable type required?
I have this set up at both ends as instructed but no signal from one half. I am almost sure that the long distance catv line only has 2 sets connected not all 4 sets. I mention this because anyone else experiencing the same issue probably has the same issue. [and I don't fix it because that's not what I do]
I did what you said: I have the main router with 2 cables out of it and connected to the splitter. Then the cable goes to another room where I add a splitter, and it splits one to another router (bridge) and other directly to PC.
I'm getting IP problem. Can you help?
BTW i understand your video instructions very well im just wondering does it make a difference since im not tryin to connect from room to room through a wall jack because the modem is in the same room with the computers PLEASE RESPOND ASAP!! thanx in advance!!
@thejuggan0t23 No, the RJ45 Splitter/Combiner will not work for this situation. You will need a router or a switch to have both your xbox and a computer connected to the internet.
@klwc If you are just using a regular rj45 splitter and not the splitter/combiner in both spots you may not get the same results. The RJ45 Splitter/Combiner only work in pairs.
@gammaexpose1 - I checked with our IT dept and they said you need a "Switch instead Splitter, [and] make sure the modem can assign the IP address to his xbox 360 (most of ADSL router runs DHCP Service)."
Hope this answers your question. Let us know if there is anything else we can help you with.
Hey, I got this RJ45 CAT5 6 Ethernet cable LAN Port 1 to 2 Socket Splitter and I have CAT 5 Cables for splitting and it is not working correctly, do you know why? Does using a rj46 CAT 5 not work with splitter? Please help
Can you just split the signal coming out of the modem and connect it to 2 wireless routers? I want to have 2 separate wireless networks in my home.
Excellent explanation. On the source side does the signal have to come from the same source? For example would it work if the source for cable 1 was an internet switch and the source for cable 2 was from an audio device connected using a balun extender over CAT 5, cable 1 on the output side would be connected to a wi-fi router and cable2 the output side would be connected to a speaker using a Balun extender. Thank you.
Why is it necessary to have a "splitter" on both ends?
hello.. thank you for the video.. so what gonna happen if you do not split the cable at router side?
Fendy Fendy if you don't split it at the router side you can only use 1 cable for internet on the other side.
I had the same issue, I only had 1 splitter in my room and i tried to use my PS4 and PC together but then i realised that only one cable was transfering the signal.
i have the motorola netopia 3000 wireless modem and im trying to setup a tech room for 1 of our local nonprofit organization and they have 7 computers in the same room with the modem will i be able to connect 1 CAT5 cable directly to the modem then connect the RJ45 splitter directly to the end of that cable & then use 2 more CAT5 cables to connect from the RJ45 splitter to 2 computers? & im planning on using this same formula for the other 3 Ethernet ports to connect all 7 computers.
I feel very stupid now because I bought a splitter so I could split the internet connection from the wall to my computer and ps3. No wonder it didn't work.
but now I have a problem:
because I have only one port that comes into my apartment, I'm not able to put a second splitter between the router and the wall.
so is there another way to split/share the internet connection to two or more devices? maybe a d-link or something?
LOL same
Try to use a switch at the 1 port u have, a switch can split signal in bidirectional way and technically make your 1 port into 4 or 8, 16 etc.
Yes, you need a router. Any old one will work. A switch or hub _probably_ won't work as your ethernet/internet provider typically will only allow one device connected to the port. But folks upgrade their routers (usually including wifi) often so older ones that work fine but might not be the latest and greatest/fastest are available cheap, or even free. Low end ones will run you around $30 online, or at discount electronics stores like Frys Electronics.
Good luck.
RichE
i love you sebastien...lol....
Aw, we love him too!
@klwc So if we understand you correctly, there are two cables coming from the router into one Splitter/Combiner, then there is the single large cable, and then the second Splitter/Combiner which the two computers are connected to, but you connected a socket to the splitter instead of the cable. Do you need the extra rj45 socket or have you tried with just the cable directly to the Splitter?
Are we not just doubling up on the same cores.
So what you're saying is that this won't work to connect 3 computers for a local game?
@CableOrganizers Okay, I am so confused. My understanding of these splitters is that you have 2 ethernet cables from 2 separate ports in the router going into the splitter. Then, you have one long ethernet cable going across your house to the other splitter. From this splitter, two more normal ethernet cables go out, one to each computer.
So the setup is (Router) ==(Split)------------(Split)== (2 computers)
This is not working for me, but that's how I interpret what you're saying in the vid...
Helpful video. This method gives the option of adding an additional computer without much work. Will there be any impact to the internet speed?
Of course, just like having two cars on one road, it will cause traffic. Recommend using a cat 5e or cat6 cable for faster speed.
Hi .. just saw your video and I was doing exactly the mistake that you explained about. Just want to double check with you. So at one end I have a printer and cctv unit through the splitter. I need to install another splitter on the other end that will have 2 wires going into the router . Is my understanding correct .
Just to add that the splitter that I have is a female on both end .. does it makes any difference ?
Thanks in Advance :)
This is a good solution if you want to save the electricity costs of powering an extra Ethernet switch ($10/year). However, once you need Gigabit Ethernet speed or 3 (or more) computers on the end, then you need an Ethernet switch instead of the cable combiner/splitter.
I wired my house this way (100 Mbit, 2 devices) over one cable - direct from router - no extra switch needed.
I have my cable running to the back of my modem and that connected to the back of my router and my router to a xbox. Can i use this to split coming out of the back of my router to connect two xboxs?
If I use the splitter directly on my modem, can I split the signal to a wireless router and to a desktop PC?
I was wondering what this is for so now I know it's only useful if the sockets are planted on the wall; otherwise just connect the cable straight to the switches located at various places then connect the computers, printers, into the port of each switches directly.
@teufelhunden29 - I forwarded your question to our IT dept and here is their answer:
"No, the RJ45 Splitter/Combiner is not meant to split a signal coming out straight from a modem. It can only split a signal on one hand if it has been combined first on the other hand. If you want two separate networks, you need to connect a switch to your modem and then from your switch, connect the two wireless routers."
Hope this helps you out and do not hesitate to contact us for anything else!
With this can you use both cables at the same time?
the spilter wont work on an 1000mps cable because it all 8 wirs
Spend $10 more and use normal Ethernet cables and a 5port Gig E switch. www.dlink.com.au/home-solutions/DGS-1005A-5-port-gigabit-desktop-switch
@Ridnarhtim That is the basic idea behind the splitter/combiner. Due to the amount of confused people, we are planning to re-shoot this video that will better explain the concept and hopefully clear up most of the confusion. Have you tested all cables, connections, jacks? Is either computer connecting?
A telephone line joiner is not the same as a splitter is it? I have 2 lines meeting into a joiner to reach the total length into another room
Can I add splitters? Lets say 4 ethernet cables out of router connected to two splliters, and those two splitters connected to one splitter and get 4 devices conected on the other end?
What to do when you are in a apartment? will I have to buy a modem, another splitter, and another cable? (Its Cat5 btw)
hello i do your instruction but its not working for me .. i connect to rj45 to my main modem to splitter and 2 rj45 to my computer and my modem 2..
i have a hard question:
i have one cable: on one side: PC and WAN and on the otherside Router
is it possible to send traffic from WAN to Router and then back to PC over 1 cable?
Hello thank you! Can i use the economiser like a switcher? Meaning if I set up my econ/splitter on the cpu end with two ethernet cables (one runs to a cpu and the other is for a laptop -- neither will run simultaneously(ever) most times the laptop will not be attached). In other words I only have one economiser on the cpu end and none at the router end. Will it still send a singal to either ports of the econ at the cpu end? I just don't want to unhook the cable from the cpu to attach my laptop on the rare occasion I am using it. THANKS!
can this work with ethernet over powerline?
Hy,
I'm not sure will you answer to me but I was wondering will these splitters work in my home, having one cable go from router to the room where is located PC and TV(internet TV), so probably you know that for iptv one of female RJ45 connectors on router is for TV so i want to know will this splitter mess up that special signal when combining with other in one cable and then again spliting it on the other end so that this special iptv signal goes only into iptv device.
Sry for bad grammar but if you understand please answer, thx
i did exactly the same two splitter at the end two ethernet rj45 but ps4 and sony blueray with ethernet the sone blueray has connection but ps4 dont in using virgin media super hub 2 with 50mb speed