Audio intercoms

Security and control requirements for an area or premises are sometimes required on a regular basis, while other times they may be needed spontaneously. The most cost-effective, quick-to-install, and easy-to-use means of control and security is an audio intercom. Installing an audio intercom allows you to quickly and affordably restrict access to a room or the grounds of an industrial or commercial facility, or, in other words, restrict unwanted individuals or groups from entering the protected area.

As mentioned above, an audio intercom requires less investment than a black-and-white intercom, or even more so, a color video intercom. It is also quite simple in installation and design, compact, and easy to operate. The operating principle of an audio intercom is quite simple. A telephone handset or sound panel and a door release button are located in the apartment or security office, and an intercom is installed outside the premises at the entrance. Using this intercom, visitors announce their presence and, if necessary, use the intercom's intercom function. The simplest audio intercoms are designed to maintain a conversation only when a guest presses a button on the outside of the intercom. There are also audio intercoms with reverse action, meaning that conversation can be initiated without pressing the call button, and pressing the button terminates the conversation. This design offers several advantages, including the ability to listen to what's happening near the intercom and at a distance near the entrance, and eliminating the possibility of false calls caused by thermal expansion or contraction of the call button.

Connecting and communicating between the two parts – the external guest and internal utility – can be accomplished using existing 220V power lines. In this case, the connection will be wireless or a dedicated line can be created. Wireless audio intercom systems are used extremely rarely, or in cases of temporary installation, such as at construction sites. When using a dedicated line, the audio intercom system is wired. It uses two wires: one carries the audio signal, and the other supplies power.

Another feature of an audio intercom system is the direction of the incoming signals – a single communication channel or multiple channels. For example, a cottage or specific facility might have a signal from an external transmitter that reaches a single point – a telephone handset in a utility room. In a multi-story building, the network from a single intercom is branched and connected to the required number of apartments.

It's important to distinguish between audio intercoms for apartments and for private homes. For the latter, an audio intercom can be expanded with expanded functionality, including fire safety sensors, special control modules, and even upgraded to a video intercom. It is also more resistant to break-ins and harsh weather conditions. Apartment audio intercoms are simpler and only offer the option of connecting an additional handset to answer calls from any room.

Audio intercoms, or more simply, intercoms, are the simplest and most cost-effective means of monitoring and securing a property. An audio intercom will allow you to screen out uninvited guests or notify you of the unexpected arrival of relatives – in short, it will make your life more convenient and secure.