Systems of
Closed TV circuit

In the area of electronic monitoring and security systems, CCTV is the acronym used for Closed Circuit TV, which originated from the English acronym for the same service, CCTV (Closed Circuit Television).

But in practice what is CCTV? Closed Circuit TV is nothing more than an internal monitoring system, carried out through distributed cameras connected to a central system, which makes images available through monitors as well as recording these records.

CCTV is mainly used for monitoring and surveillance, aiming to record security incidents, vandalism, improper behavior and several other occurrences. However, it has also been widely used for other purposes, such as road monitoring, environmental, behavioral, work safety, among others.

 

The Main Advantages

Through the use of CCTV it is possible for a security team to monitor in real time and even remotely what is happening in each environment, 24 hours a day, and take the necessary actions when any abnormality is detected.

In addition, it allows registered images to be recorded and analyzed later, helping to identify suspects and even being used as evidence in legal proceedings.

Another advantage is that the presence of a CCTV system, mainly due to the cameras, inhibits the action of criminals and malicious people, as it is clear that everything that is being done in that environment is being monitored and recorded.

 

Analog System x Digital System

 

To understand what CCTV is, it is also important to know the difference between the two types of systems used, analog and digital.

Analog systems have been used since the beginning and in it the analog cameras are connected to the central devices (DVR) by coaxial cables and the images are then displayed on specific monitors.

With the digital system, the image quality is much higher, as cameras with IP technology are used, these are connected through UTP cables (network cable) to the central terminal (NVR), which in the end can make the images available remotely, through HD monitors and even through cell phones and tablets.

Analog systems are still the most used due to the legacy built during the last decades and mainly because of their lower cost, but still maintaining an acceptable quality.

On the other hand, digital equipment tends to be more expensive, but the quality of image detail is much higher, and this has been the current and future market trend.

The video below from the equipment and service provider Intelbras explains well the advantages of IP CCTV: