Analyze the characteristics and construction precautions of the six types of cables

What is a Category 6 cable? What are the characteristics and construction precautions of the six types of cables? Below, cable network Xiaobian takes you to learn more about these
.

Definition of Category 6 cables:

The transmission frequency of this type of cable is 1MHz ~ 250MHz, and the comprehensive attenuation crosstalk ratio (PS-ACR) of the six-category wiring system should have a large margin at 200MHz, which provides 2 times the bandwidth of Category V, Category V line is 100M, Category V is 155M, and Category VI is 200M
.

Features of the six types of cables:

1.
Cable tensile tension

Do not exceed the cable tensile tension specified by the cable manufacturer
.
Excessive tension deforms the stranding pitch in the cable, seriously affects the ability of the cable to suppress noise, and seriously affects the structured return loss of the cable, which will change the impedance of the cable and damage the overall return loss performance
.

2.
Cable bending radius

Avoid excessive bending of the cable, as this will change the twisting distance
of the pair in the cable.
If bent excessively, the line pairs may fall apart, resulting in impedance mismatches and unacceptable return loss performance
.
In addition, the relationship between the four stranding distances inside the cable will change, resulting in noise suppression problems
.
In general, the cable bending radius shall not be less than 8 times
the diameter of the cable after installation.
For typical Category 6 cables, the bend radius should be greater than 50 mm
.

3.
The line pair is scattered

At cable termination points, the stranding distance for each pair in the cable should be as close to the data center
as possible.
The wire pair strand is calculated by the cable manufacturer, and changing the cable strand will adversely
affect the cable performance.
Although the ISO and TIA Category 5 cabling standards specify the length of the wire pair (13 mm), they do not make such provisions
for Cat 6 routing.
The current recommendation is to comply with the recommendations
provided by the manufacturer.

4.
Cable compression

Avoid compressing the cable
by overtightening the cable ties.
Overtightening of the cable will deform the stranded wire inside the cable, affecting its performance, and generally make the return loss more obvious in the unqualified state
.
The effect of return loss accumulates, and each overly tight cable tie pair increases the total loss
.
Hooks and loop cable ties
are recommended.

5.
The cable is knotted

When pulling the cable from the reel, be aware that the cable may sometimes get knotted
.
If the cable is knotted, it should be considered as damaged and the cable
should be replaced.
Installation pressure can cause the installer to straighten the cable knots
.
However, damage has already occurred and is detected when the cable is tested
.

6.
Cable weight

Category 6 cables weigh about twice as much as Category 5 cables, with 24 Category 6 cables weighing nearly 1.
0 kg a meter long, while the same number of Category 5 or Beyond Category 5 cables weighs only 0.
6 kg
.
When using suspension wires to support cables, the cable weight
must be considered.
It is recommended to support a maximum of 24 cables
per bundle per suspension line support point.

7.
The number of cables in the bundled cable

When any number of cables are bundled together in a very long parallel length, the capacitive coupling of different cables in bundled cables with the same stranding pitch results in significantly higher
crosstalk.
This is called "foreign crosstalk," and the best way to eliminate the adverse effects of foreign crosstalk is to minimize the length
of parallel cables.

8.
Peel off the cable sheath

At cable termination points, the pair of wires exposed from the outer skin to the data center after termination must be kept to a minimum
.
If it is not necessary to peel the cable sheath, the conductor can be connected directly to the
data center.
The TIA or ISO wiring standard specifies the length of the stripped sheath, which guarantees the stranding distance inside the cable to achieve the most efficient transmission path
by minimizing the stripped sheath length.
Excessive sheath peeled off the IDC will impair the NEXT and FEXT performance
of the Category 6 cabling system.