The system is the technical architecture that defines how intercom devices are connected and communicate: whether the signal is analog or digital, whether it is transmitted via cable or IP network, and whether the devices are arranged in a star (radial) configuration or share a common bus. Each type of system has its advantages depending on the environment, the number of devices, and the required level of integration.
This section explains the main system models used in intercom applications: from classic analog setups to modern IP systems, including hands-free, radial, and bus configurations.
The way devices are connected also defines how people communicate.
What is an IP intercom system?
It is a system that transmits voice (and sometimes video) signals through computer networks using the IP protocol. It enables remote communication, integration with other systems, and scalability.
Suitable for modern buildings, as it uses the existing data network and allows control from mobile devices or computers.
What is an analog intercom system?
It is a system that transmits voice signals through continuous electrical waves, without digital conversion. It uses physical wiring (usually 2 or 4 wires) to connect the devices.
It is robust and simple, but less flexible than digital or IP systems.
What does it mean for a system to be hands-free?
It allows communication without the need to press buttons or hold the microphone. The system automatically detects when to speak and when to listen.
It facilitates interaction at counters, service windows, or public attention areas, improving accessibility.
What is a radial intercom system?
It is an architecture in which each device connects directly to the control center (like a star). There is no connection between devices, only with the main node.
It allows direct and simple communication, but may require more cabling in large installations.
What does it mean for a system to be “bus-based”?
It means that all devices share a single communication cable, as if they were connected in series. Each device has an address and responds when called.
It reduces cabling and allows cleaner installations, although it requires more precise planning and configuration.