Recently, there has been such a tendency that people have ceased to trust law enforcement agencies and are themselves equipping the protection of their "fortresses". As the saying goes: "the salvation of a drowning man is the work of the drowning man himself." And in this there is a certain sense, because you can get maximum confidence in your protection only when you yourself make sure of all the principles and conditions for the operation of security systems.
People stopped trusting even any console guards, since cases of untimely arrival of employees of the private security company and other incidents that led to unpleasant consequences are quite frequent. That is why most modern people prefer to independently organize their own security and acquire various technical means to fulfill these goals. One of the simplest (at first glance) and very effective means are video intercoms.
The main difference between all devices is the presence of additional functionality, design and technical characteristics of the main elements. Branded outdoor panels that come with the device have a more attractive appearance in comparison with separate ones, and also have the ability to change the camera's viewing angle. Almost all call panels are equipped with infrared illumination, which provides normal visibility to the camera in conditions of insufficient visibility at an average distance of 0.5-1 meter.
If there are thoughts about installing additional devices, such as an external video camera or a memory unit, then it is better to purchase a receiving monitor in advance with additional inputs that will provide the ability to connect these elements. By slightly overpaying today (5-10 dollars), you will provide yourself with the opportunity to increase the scale of the system at any time. I would also like to warn you about the complexity of installation and maintenance of two-wire video intercoms. It is better to install such intercoms in the case of an already laid cable line or the impossibility of using additional wires. As for the color of video intercoms, the choice here depends on the personal preferences of the user, but it is worth noting that the quality of color liquid crystal displays mounted in receiving devices still leaves much to be desired, and the light sensitivity of black and white cameras always exceeds color ones. In addition, the cost of color video intercom systems is twice as high as similar black and white ones.
You should read about intercom customization if you are interested in this area and it will help you choose the best intercom system for you