Ethernet splitters are a great way to reduce the amount of network cable you have in your house and save money. Splitters work by simply allowing two lanes of traffic to travel down an ethernet cable. Ethernet cables only use 4 out of the 8 wires they have when sending and receiving data. A splitter makes it possible for you to force two lanes of traffic down one cable. This allows you to almost halve the amount of cable between to network connections by using one cable instead of two. If you want to make your own ethernet cable splitter then the good news is that they are actually very cheap and anyone should be able to construct one without any outside help. If you are up for the challenge then here is what you need to do to make your own splitter.
The main components of the splitter are very basic and extremely cheap. It shouldn't cost anymore than a few dollars to get everything you need. The parts that you will need include two RJ45 crimpable plugs, four RJ45 keystone jacks and some scrap ethernet cable. In addition to this you'll also need the following tools to make assembling the splitter possible. One RJ45 crimp tool, a cutting knife (craft cutting knife is recommended), a 110 punch down tool and some super glue. That's everything you will need and once you have that you can start assembling it all together.
The first step is to crimp the RJ45 plug onto the ethernet cable. Wire 1 needs to be matched to white and orange. Wire 2 is matched to just orange. Wire 3 is matched to white and green. Wire 4 is matched just to blue. Wire 5 is matched to white and blue. Wire 6 is matched to green. Wire 7 is matched to white and brown. Wire 8 is matched to brown. Once you've done that, the next step is to cut off the other end of the scrap ethernet cable, about 9 inches, and punch down the four pairs of RJ45 keystone jacks. The wiring for the jacks should be as follows:
1 White/Orange to pin 1keystone jack
2 Orange to pin 2 keystone jack
3 White/Green to pin 3 keystone jack
6 Green to pin 6 keystone jack
4 Blue to pin 2 keystone jack
5 White/Blue to pin 1 keystone jack
7 White/Brown to pin 3 keystone jack
8 Brown to pin 6 keystone jack
You are almost done. The next step is to super glue the keystone jacks together and then you are done. Since splitters need to be used in pairs, you will need to make a total of two of these. Simply repeat the steps above to make a second ethernet splitter.
Splitters can be used anywhere that you need to connect two networks together. Network here could mean computers or hubs and switches. It isn't important, what is important is that you setup the splitters in pairs. Since splitters force two lanes of LAN traffic down one LAN cable, you need one splitter on one end to funnel the traffic into the single lane and then another splitter on the other end to separate the traffic as it comes out. IF you use just a single splitter, what you will find is that no data can be sent or received along your cable, because there is no separation of the traffic being done on both ends.