How to create Network Cable (UTP - RJ45)

Creating your own custom-length network cables is quite easy once you have the know-how and the right tools.

 It’s easy to head to the electronics store to buy network cables, making do with cables of predetermined lengths can be a problem. More often than not, premade cables are either too short (and require coupling) or too long (in which case, you have to tie up excess cabling and tuck it away somewhere).

Making network cables takes just a little cutting and crimping, plus a bit of wire arranging.
All of that stuff may sound expensive, but you can find a full network-wiring toolkit--containing the necessary tools, ends for network and phone cables, a cable tester, and some other assorted part.

( Sa CD R-King meron nyan)

Approximately Price:

  1. (LAN) UTP CABLE : 10 to 12 pesos per yard
  2. (LAN) RJ 45 : 7 to 10 pesos each
  3. Crimping Tools : 200 Pesos
  4. Cable Tester : 400 pesos

Here's how to do it.

Wiring Schemes
You'll find a couple of standard wiring schemes and types of network cables. The Telecommunications Industry Association's T568A and T568B standard wiring schemes define the order of the individual wires and pin-outs for eight-pin modular connectors and jacks, such as those used for network cables. Depending on how you wire the cables, you can make “straight-through” or “crossover” cables; I'll give you more details on what those are in just a moment. First, take a look at the following diagrams to figure out how to arrange the wires to make your cable.

Wiring Standards

Pin #    T568B                             T568A
1    White/Orange                  White/Green
2    Orange                                  Green
3    White/Green                    White/Orange
4    Blue                                       Blue
5    White/Blue                       White/Blue
6    Green                                      Orange
7    White/Brown                    White/Brown
8    Brown                                    Brown

 This specification applies to typical twisted pair network cabling including Category 5E (CAT5E) and Category 6 (CAT6).

BLOGMYTUTS TAKE NOTE: Did you know in 8 wires  4 only here are use  PIN 1,2,3,6,
 We have 8 wires because of color coding scheme, we have 4 pairs  1 solid color and 1 with white stripe.
The reason for this is to remember  easily which color and what scheme did you use.

kung nag titipid ka 2 magagawa mo LAN cable sa isang UTP cable gets mo?

PIN 1 is the LEFT side if the cooper pin teeth face you.
Example: T568B

UTP categories available today:

Category 1/2/3/4/5/6 – a specification for the type of copper wire (most telephone and network wire is copper) and jacks. The number (1, 3, 5, etc) refers to the revision of the specification and in practical terms refers to the number of twists inside the wire (or the quality of connection in a jack)

 For most home-networking circumstances, you’ll want to use the T568B wiring scheme and straight-through cables. The network cables currently connecting your broadband modem, router, and PC or media player to your network switch are all straight-through cables. The T568A wiring scheme may be present in some preexisting residential network wiring or other similar projects, but the vast majority of premade network cables available at retail (at least in our experience madalas gamitin kahit yung nabibili ganito sila ) use T568B.

Crossover cables are a different matter. Crossover cables serve only to connect similar devices together, in lieu of a network switch or hub. For example, you can connect two PCs directly to each other to transfer data between them using a crossover cable (ginagamit ko tuwing mag babackup PC to PC ). Years ago, connecting one network switch to another also required a crossover cable, but most modern switches, hubs, routers, and similar devices are now equipped with Auto-MDIX ports that can detect whether a crossover is required and automatically choose the MDI or MDIX configuration necessary to properly connect to whatever device is at the other end of the cable.

I have included the diagrams above to illustrate the different wiring schemes. Inside standard CAT 5, 5e, and 6 cable, you'll find four twisted pairs of wire of varying colors: orange with orange/white, green with green/white, blue with blue/white, and brown with brown/white. You may also see some fibers in the cable that add tensile strength, and that you can cut off when you're crimping on a connector--the fibers don’t carry any electrical signals.

To make a common, straight-through cable, you need to arrange the internal wires and place them into connectors with the same T568B (or T568A) scheme at both ends of the cable.
To make a basic crossover cable, use T568A at one end and T568B at the other.
Or, to make a 1-gigibit-suitable crossover cable, you must cross all four of the pairs.

Crossover Cable:

Prepare the Cable

To make a straight-through network cable (which is what you probably need for home networking), first cut a piece of cable to your desired length; be sure to add a few extra inches, though, because you will be stripping and trimming the ends to fit into the connector. Once you’ve cut the cable, use the blade built into the crimping tool to strip about 1.5 to 2 inches of the cable’s sheath to expose the twisted pairs of wire within. Next, unravel the pairs and straighten them in your fingers. Unravel only the tiny bit of wire that’s exposed, however, as the twists are there to minimize interference.

After straightening the wires, you can arrange them using the desired scheme. We used T568B in the examples here, so we arranged the wires in this order:

  1. Orange/White
  2. Orange
  3. Green/White
  4. Blue
  5. Blue/White
  6. Green
  7. Brown/White
  8. Brown

Note that pin 1 in an RJ45 connector is at the far left, when the connector’s contacts are facing up and away from you.

Make the Connections
When you have arranged the wires in the proper order, hold them tightly in your fingers and then feed the loose ends into your cutting/crimping tool. You’ll want to cut the ends perfectly straight, leaving about a half-inch exposed from the cable sheath.

Then, simply feed the wire into the RJ45 connector, with the connector’s contacts facing upward. Once you get the hang of it, you’ll find that you can use the top, inner surface of the connector as a guide when you're feeding the wires in. Push each wire in firmly so that it reaches all the way to the top of the connector. About a quarter-inch of cable sheath should also make its way into the end of the connector, where you will crimp it to hold it firmly in place.

After you have pushed the cable all the way into the connector, perform a quick visual inspection to confirm that the wires remained in the correct order. Then insert the connector into your crimping tool, and give it a firm squeeze. Repeat the process on the other end of the cable, and you’ve just made your first straight-through network cable. Next, plug it into the tester, making sure that you have continuity and that the wires are in the correct arrangement. If the cable passes the test, it’s ready to use.

Once you've inserted the cable, closely inspect the wire arrangement and crimp the connector in place.

Congratulations, you've mastered the art of making your own network cables! While you have your tools and equipment out  check your Cable if they properly crimp using Cable Tester.
It should blink same from 1 to 6  that means you crimp it right. Pin 4,5,7 and 8 are optional no need .
If you use crossover LED blink 1 and 6 , 2 and 3.

straight -  ( UNLIKE  Device Type  or 2  Not Similar Device)
example: router and a switch , pc to router ,

cross over - ( LIKE Device Type or  2 Similar Device )
example: router to router, pc to pc, hub to hub

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