An audio intercom lets an occupant speak with a visitor, while a video intercom adds a view from the entrance. The useful question is how visitors are identified at your property. A clear picture may help, but it depends on camera placement, lighting and the selected equipment, not simply the presence of a screen.
Consider the visitor's experience as well. The call button should be identifiable and the panel easy to locate. For a building with several occupants, the directory needs to match the units or approved names. Poor labeling can cause missed calls even when the electronics are working correctly and the audio is clear.
Inside the property, decide whether calls should reach a fixed station, compatible phones or both. These choices affect equipment, connections and administration. Existing wiring may support some options but not others, so an inspection can prevent assumptions about what can be reused. Ask about any ongoing service requirements before approving the system.
770 Doors & Windows can review the entrance, wiring and visitor routine before recommending an installation. Share the number of units, photos of the existing panel and the main problems you want resolved. A practical intercom plan explains how visitors call, how occupants answer and how approved door release will operate.