Protocols are the technical language that allows intercom devices to understand each other. They define how data is transmitted, how a call is initiated, how information is structured, and how compatibility is ensured between equipment from different manufacturers. Some focus on data transport (such as TCP/IP), others on signaling (such as SIP), and others on integration with security or control systems (such as ONVIF, HTTP, or JSON).
This section explains the main protocols used in modern intercom systems: from the most basic to those that enable advanced integration with IP networks, video surveillance, or web platforms.
Without protocols, there is no communication. And without communication, there is no system.
What does IP mean in intercom systems? And TCP/IP?
IP (Internet Protocol) is the protocol that enables data transmission over computer networks. In intercom systems, it means that devices connect and communicate using the local network or the internet.
It allows integration of audio, video, access control, and monitoring within a single digital infrastructure.
TCP/IP (Transmission Control Protocol / Internet Protocol) is the set of protocols that enables data transmission between devices over computer networks. In intercom systems, it is used to connect control units, substations, video door phones, and other equipment via local networks or the internet.
It is the foundation of digital communication: it ensures that data reaches its destination in an orderly, reliable, and compatible way between devices.
What is VoIP and how is it used in intercom systems?
VoIP (Voice over Internet Protocol) is a technology that allows voice transmission over IP networks, converting sound into digital data that travels through the internet or local networks.
It enables audio (and video) calls without the need for traditional phone lines, integrating communication, control, and monitoring into a single digital infrastructure.
What is the SIP protocol and what is it used for?
SIP (Session Initiation Protocol) is a signaling protocol that enables the initiation, management, and termination of real-time communication sessions, such as voice or video calls.
It is the most widely used standard in IP intercommunication due to its flexibility, scalability, and compatibility with multiple devices and platforms.
What is ONVIF and what is its role in intercom systems?
ONVIF (Open Network Video Interface Forum) is an open standard that ensures compatibility between IP security devices, such as cameras, recorders, intercoms, and access control systems.
It allows devices from different brands to work together seamlessly, as long as they share the same ONVIF profile.
What does HTTP/JSON mean in intercom systems?
It is a way to integrate devices using web requests (HTTP) and structured data format (JSON). It allows sending and receiving information between systems, such as commands, statuses, or events.
It facilitates integration with SCADA platforms, security systems, or control software using standard browsers or applications.