I use both audio and video intercoms BAS-IP. I will tell you about its characteristics:
-Designing custom interfaces. In addition to standard solutions suitable for most tasks, BAS-IP can offer the development of unique individual interfaces for projects.
-Elevator control. The resident of the complex can use their door entry monitors. To open the door for their guest. Then the guest can only go up to that floor. Where the resident resides. If residents have an ID at the entrance, the elevator can take them directly to the floor.
-Communication with the concierge and security guard or management company. At the push of a button on a device in their apartment, residents can contact the concierge or security company.
The ability to install third-party applications. The panels have a screen with an intuitive graphical interface. And a convenient guest book for displaying company logos or indoor phones
of apartment owners.
I hope you found this information interesting. And I helped you with your choice of intercom system.