Unlike an ordinary intercom, the video intercom allows you to not only hear, but also see the guest who has come. Several varieties of this device are currently produced. The video intercom can be wired and wireless, with a black and white or colored camera, with a tube or a loud-speaking connection. Which option is best to choose?
If we talk about optics, then the color image on the screen looks, of course, just wonderful. However, the option with a black and white camera from accounts should also not be discarded. The fact is that the optics transmitting the image in color very poorly “sees” at dusk. Black and white cameras cope with this task much better. Some models also supply manufacturers in the same infrared backlight. This addition helps to see the interlocutor at a distance of one meter in complete darkness.
When choosing a video intercom, it is worth paying attention to such a parameter as the angle of viewing of the camera on this characteristic depends on how well the interlocutor will be visible. In order to see one visitor, a camera with a viewing angle of 550 is needed, two – 720. Domophones are currently produced mainly with large format equipment. Such cameras allows you to clearly see not only the calling guest, but the entire adjacent door of the entrance.
As for the voice connection, here the choice of the model depends primarily on the personal preferences of the owner of the apartment. Both the tube and the loud -speaking connection are quite convenient. When buying, it should also be taken into account that in different models you can carry out negotiations with the visitor either once by pressing the button, or holding it all the time of the conversation.
Some models of video intercoms are complete with the cable. However, when installing it is most often not used. The thing is that it usually turns out to be too short. Therefore, most often this element has to be bought separately. When installing an intercom, we should not forget that with a cable length of more than 30 m, interruptions are possible due to the opening/closing function of the door.
Many apartment owners purchase wireless models of video intercoms. Their main convenience is that a long cable is not needed for them at all. A short piece of one meter enough to connect a calling panel with a special transmitting unit. This device is installed on the street in a sealed plastic case. Wireless models allow you to communicate at a distance of up to 150 m, and in the presence of various kinds of obstacles up to 80.
When buying a video intercom, first of all, you need to pay attention to the angle of viewing of the camera, as well as take into account other parameters – the length of the cable necessary for the correct installation, the method of voice communication, etc.D.