In the age of internet and speed, the disruption of internet communication is considered a fundamental problem. When you have an online class and suddenly the internet is cut off. Looking for a cause? When such problems occur, it is said that noise is a problem and it is better to use a noise blocker! But what is the effect of noise on the network cable? Why does this happen? Stay with us to find answers to your questions.
What is noise?
Before the advent of Internet networks, noise was a type of abnormal sound that could also be called noise pollution. As technology advances and the Internet age begins, we continue to define noise in terms of wireless communications. Noise refers to any energy interference that negatively affects the quality of a wireless signal. Of course, this destructive energy can be natural or man-made. A simple example is trying to make a phone call at a busy event where noise can interfere with the sending and receiving of wireless communications. However, it is important for wireless network engineers to understand how the noise is generated so that they can implement the right solutions to solve the problem.
Either way, the effect of noise on the network cable is one of the issues facing the world of technology and networking that can affect any person or organization as a user of this technology.
Types of noise on the network cable (causes of noise)
What is the effect of noise on the network cable? How to identify and fix
In the age of internet and speed, the disruption of internet communication is considered a major problem. When you have an online class and suddenly the internet is cut off. Looking for a cause? When such problems occur, it is said that noise is a problem and it is better to use a noise blocker! But what is the effect of noise on the network cable? Why does this happen? Stay with us to find answers to your questions.
There are various causes of noise that can interfere with wireless networks. The causes of noise can be natural (eg atmospheric interference) or man-made (eg electrical transformers). In general, in order to identify the effect of noise on the network cable, it is better to know the causes of the noise. For this reason, it can be classified into two types, external and internal.
External noise:
It is any noise caused by a source outside the wireless network. For example, let’s say you’re trying to call someone over the radio; But you get interference because another radio nearby is making noise that interferes with the signal. Other causes of external noise include weather changes such as strong wind or the simultaneous use of electrical appliances.
Internal noise:
This type of interference refers to any type of noise created in a wireless network. This type of interference can look like you yelling while your friend is trying to talk to you. A simple example of noise generated in an indoor wireless network is the interference of a home’s Wi-Fi network with a cell phone. However, regardless of the source of noise in the wireless environment, it is always best to reduce such cases
Of course, in another division, the types of noise on the network cable are introduced with four categories: thermal noise, inter-modulation noise, interference and impact noise, which are internal and external noise.
What is cross-talk noise?
Co-hearing noise is a disturbance caused by the electric or magnetic fields of a telecommunication signal on the signal in the adjacent circuit. Basically, every electrical signal has a different electromagnetic field. Whenever these fields overlap, unwanted signals (capacitive, conductive, or inductive coupling) cause electromagnetic interference (EMI), which can cause mutual interference. The effect of noise on the network cable in this co-hearing noise is caused by the overlap with structured cabling, integrated circuit design, audio electronics and other connection systems. For example, if there are two adjacent wires carrying different signals, their currents create magnetic fields that produce a weaker signal in the adjacent wire.
Among the examples of this type of noise can be mentioned the noise of hearing in a telephone conversation, interference in cabling and the design of the main circuit.
The solutions to eliminate cross-talk noise are as follows:
Eliminate cross-talk noise by spinning the wires together
This method reduces interference. The more bend the wires have, the noise will decrease and like the higher generation cables that have more twist and receive less noise.
Eliminating Cross-talk noise by using shield in network cable
Wrapping metal shields around the wires reduces the possibility of wave interference. Also, by wrapping the shield around all pairs, the network cables will not interfere with each other.
In general, the types of network cable in terms of structure and shield used in it are: UTP network cable, FTP network cable, STP network cable and SFTP network cable, which is the best type of network cable. Click here to see the difference between these cables.
Eliminating co-hearing noise using a high-end network cable
All types of cables are offered in the market according to the categories of Cat5, Cat5e, Cat6, Cat6a, Cat7, Cat7a and Cat8. The higher the CAT number, the higher the data transmission power and the speed of the cables based on the frequency, as well as the lower their noise.
What is white noise (thermal)?
This noise is caused by electrons that are excited at temperatures above zero (Kelvin) and flow randomly in the wires. This noise is always there and there is no way to completely eliminate it. But you can reduce the effect of noise on the network cable by using proper modulation.
Cross modulation distortion noise
This noise happens when two signals with different frequencies pass through the same path. In this case, at some frequencies, the signals will be superimposed and it is possible to change them and even become another signal. To eliminate this noise, Orthogonal Frequency-Division Multiplexing or OFDM should be used.
Multipath interference noise
Multipath interference noise occurs more when sending data wirelessly. When data is sent by a device, several signals similar to the original signal may be sent through several other paths unintentionally and accidentally (for example, the reflection of the same signal reaches the destination from another path). These signals are received with a time delay at the destination and interfere with the original signal. This interference can cause data loss or change on them.
What is a cable ferrite or cable noise suppressor? How to use cable ferrite or cable noise canceller
Cable ferrite or noise absorber is usually used at the end of the connection cable to eliminate magnetic interference and the effect of noise on the network cable. This type of noise canceling cable is usually made of ceramics with a combination of bivalent metals and iron oxide. It is enough to install it at the end of the connecting wire. Remember that it should not be installed in the other place of the wired connection because it will have less effect.
How to identify the type of noise according to the effect of noise on the network cable
First of all, the effect of noise on the network cable should be considered, that is, it should be identified whether the noise is permanent or temporary. Intermittent noise may be caused by a lightning strike or a busy mobile phone. Static noise may be based on electrical impedance coupling in the path. However, the identification of noise generation is a professional matter and should be left to the network engineers. Engineers and experts investigate the situation if they encounter constant noise.
In situations where two or more electrical circuits have common conductors, there may be some connection between the different circuits with destructive effects on the connected circuits. In essence, this means that the signal flow from a circuit is reversed along the common conductor, resulting in an error voltage along the return path that affects all other signals. This type of noise created is called error in galvanic connections. Maybe electrostatic problems are the cause of this issue. In any case, it is better to entrust the work to a professional and consult with reliable collections such as optical fiber to get the right result.
