![]() ![]() (IP intercoms tend to use preexisting network infrastructure. This connection goes on for however long the resident desires. For this reason, IP intercoms are also called SIP intercoms. One of the most popular protocols for audio and video delivery is the Session Initiation Protocol or SIP. To transmit audio and video data, IP intercoms use organizational rules called protocols. ![]() The tenant then uses the terminal to communicate with the visitor and grant them access to the building. The door station uses the internet to send a signal to the correct terminal, notifying the tenant of their visitor. Terminals are also called substations.Ī visitor seeking entry into a building with an IP intercom selects a tenant from the directory on the door station. Today, you can install an IP intercom terminal wirelessly. In the past, terminals were in residents’ apartments and required you to run wiring throughout the building.
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