Intercom systems are an essential component of an effective property security system. Intercom systems allow two-way audio or video communication between residents and visitors, so that residents can verify the identity of visitors before allowing full access to the property.

Intercom security systems are extremely flexible. Depending on your needs, they can be deployed as a standalone physical security solution or they can operate as part of a wider access control network and supported by other visitor and delivery management systems.

Modern intercom systems are widely used in many different types of buildings, including residences, multi-tenant apartment buildings, condominiums, and gated communities. Similar systems can also be found in commercial office buildings and campuses, industrial sites, educational institutions, and public buildings.

While the size and complexity of these systems can vary depending on the use case, many of the basic intercom components remain the same. Common installations range from simple intercom doorbells to contactless intercom systems and smart intercom systems that can integrate with smart building technology and management solutions.

To help readers choose the most appropriate door intercom system for their home, this guide provides an overview of the operation and key components of modern security intercoms, as well as a range of common applications and expected benefits for occupants and building owners.