schema Cable RJ45

What is an RJ45?

The RJ45 is the network cable from base, you all know, it comes in several categories (which correspond to its quality, the type of armor ...), in general, we use all the Category 5 ( 100Mbits).
There are two types, straight and crossed (this is how the son are connected to the catch). The cross is not (almost) only one thing, connect a computer to another, directly, for the rest, when one goes through hubs, switches, routers are used cables.

Make a RJ45 crossover cable or straight

 

 

It's very simple, there's not a big effort to be made, you just need the cable shielded twisted pair network to four single-stranded (Category 5E), RJ45 connectors, crimp a crimp RJ45 plugs and if you want to protect your work, sleeves for protection and reinforcement of soft PVC.

Cut off a length of network cable to the desired size. Strip off the cable and shielding on both ends in order to have more than 4 pairs of colored sides. Do not strip off the pairs. Apart the pairs and extend the strands.

If you use the protective sleeves put on cable now, because once your cable is used it is too late.

RJ45 crossover cable

 

Using a crossover cable:

The use of a hub is very useful for connecting multiple computers and is much faster than a connection to the coaxial cable. However, to connect two machines together there is a technique for avoiding the use of a hub.
This technique is to use a crossover cable (in English cross or crossover cable), a cable whose son two intersect. The recommended standard for this type of cable is TIA / EIA T568A to one end, the TIA / EIA T568B for each other. This type of cable can be bought commercially, of course, but it is very easy to do yourself.

color scheme for an RJ45 crossover cable:

RJ45 cable side - side network card

Available colors RJ45 crossover cable:
The arrangement of colors in the two side of a cable rj45 is not the same , On the one hand we find that the son is arranged in the same manner as a direct cable but on the other there is a provision making the crossover cable:

Right side:

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

Cross-listed:

  1 - White-Green
2 - Green
3 - White-Oranqe
4 - Blue
5 - White-Blue
6 - Orange
7 - White-Brown
8 - Brown

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Cable RJ45 Law:

 

Using a straight-through cable:

The RJ45 is normally used to connect computers via a hub (in French hub, a distribution box which just connect the RJ45 cable from the computers on the LAN) or a switch (in English switch).
When a computer is connected to a hub or switch, the cable used is called straight-through cable (patch cable in English), meaning a wire connected to a socket on one side is connected to a decision on the other side. The standard generally used to make wiring cables rights is the TIA / EIA T568A, however there are straight cables per TIA / EIA T568B.

color scheme for a straight RJ45 cables:

 

RJ45 cable side - side network card

Available colors of the RJ45 cable:
If the color change of some son, this will not affect the operation of an RJ45 cable to the extent that the son are linked in the same way, and plugged into the same provision.

The same on both side:

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

Some inscriptions on the cables
AWG: Diameter of a wire
STP or FTP: Foiled Twisted Pair (cable), FTP = foil, STP = metal braid.
UTP: unshield twisted pair (unshielded cable).
EN 50173, ISO / IEC 11801: Standard wire.
Category x: Where x is 3 to 7 (3 = cable supports 10Mb / s, 7 = 1000Mb / s (standard in the study)).
Cable blue or yellow: Fire.
M x: x is an inscription in length. Practice to determine the length in meters of cable that you want to make from rolls of several tens or hundreds of meters.