Buy a door phone in Kiev is not a trivial task for any consumer. Difficulties arise during the installation phase of the system. At the same time, when buying a video intercom, some questions may arise. For example, which device to choose or how many channels are needed. I would like to give a couple of tips on this. Firstly, to begin with, it is necessary to determine the color or black and white video block is interested. In addition to the advantages of appearance and image quality from color units, there is nothing to wait for. For the privileges of this kind it is necessary not to fork out a little. Basically, a color intercom turns out to be more an element of decor and style, rather than part of an access control system. Therefore, if the decor of the room plays a very large role, the preference should definitely be given in favor of a color intercom system. If the unit is installed to directly control access, then the quality of the black and white system will be more than enough. The viewing angle of the black-and-white camera built into the calling panel and its resolution is no worse than the color calling panels. Functions of remote opening of doors and management of electromechanical locks at both systems are identical. In general, when buying a doorphone, it is still worth consulting a specialist. Suggesting him to select the system for the finished technical task. The decision taken together is guaranteed to bring more benefits and eliminate possible problem situations. Many people reject the idea of buying a door phone, realizing that installation by the forces of third-party installation teams is expensive, and independent connection is quite a complicated procedure.