How to crimp a twisted pair?

First, let's see what isa twisted pair. This communication cable consists of one or more pairs of insulated conductors. The conductors are twisted together and covered with a plastic sheath. The network cable used to connect to the Internet consists of four pairs of conductors.

Before you compress the twisted pair, you need to decide for what purposes you will use it. there is two main types of crimping twisted-pair connector:

• 
  direct link - for connecting a computer and a switch / hub / router
• 
  cross-link - to connect two computers together

With a straight link, both ends of the twisted pair are crimped in one pattern, with the cross linking in different directions. Usually when twisted pair for a straight line conductors twisted pair are arranged in the following order:

• 
  white / orange / orange / white / green / blue / white / blue / green / white / brown / brown
  

When crossover link one end of the twisted pair is compressed by the previous scheme, and the other by the other:

• 
  white / green / green / white / orange / blue / white / blue / orange / white / brown / brown
  

In principle, modern network cards can "understand" and direct link when connecting two computers, but it is better to be safe.

So, how to crimp a twisted pair at home? To do this, you will need the cable itself, several RJ-45 connectors and a special tool called crimping pliers (crimper, crimper).

Crimp pliers consist of three working areas, each of them - its own functions. The handle is located knife for cutting wires, and some models have a recess designed to remove the outer insulation from the round cable. In the center of the swage there is a special nest, in which the connector is also crimped. And in the top part of the crimper there is an area that helps peel the outer insulation twisted pair.

So, to compress the twisted pair, you need to firstgently trim the end of the cable with the built-in knife. Then it should be cleaned about three centimeters of the cable from the insulation with a special knife. In principle, you can replace it with an ordinary knife or scissors.

After this, you should dilute, untwine andalign wire pairs. Then you need to distribute the wiring according to the colors in accordance with the desired scheme and align. After tightening the aligned conductors, it is necessary to cut their tips with the help of a built-in knife, leaving about 1 cm of woven conductors.

After this, the aligned conductors are inserted into theconnector RJ-45. Sections of conductors must reach the end of the troughs. Make sure that the cable sheath comes out behind the latch, designed for fixing, and also comes to a stop. Then you need to check again whether the conductors are correctly laid out in colors and put the connector in the swage until it stops. After this, squeeze the crimping pliers until the cable lock of the fork clicks into place.

But it happens that you do not have crimps, but compressa twisted pair, well, just bad. Then you can use a thin screwdriver to crimp it. This method is more labor-intensive and less effective, but in an emergency situation it can be useful. How to crimp a twisted pair with a screwdriver?

As in the previous case, it is necessary to cleanIsolation, expand the conductors by colors and insert them into the connector. After this, the plastic connector retainer and the contact dents must be dumped so that they do not protrude over its surface. To do this, press on them across the end of the screwdriver. After this, you need to deploy the screwdriver along and finally drown the contacts, so that the teeth come into the insulation. You need to push hard, but carefully.

Check if you managed to squeeze the twisted pair correctly, you can use special device - tester. Although in some cases, even a tester is not needed - a poorly working or not working network and will show that the cable is crimped badly or incorrectly.