![]() They enable tenants to open the door for visitors from their unitsīuzzer systems can also be used in commercial buildings and offices.So how do you let your friend know you’ve arrived? And how do you get inside? You ‘buzz’ them. When you arrive at the apartment building, the front door is locked to maintain building security. Say you’re visiting your friend at their new walk-up in New York City. Sometimes called a door buzzer, an apartment buzzer lets visitors notify tenants they need access to a building. ![]() But how do they work, and how do you find the right intercom for your building? Most common in big cities, apartment buzzers enable tenants to open the building’s front door for guests without leaving their apartment. As one of the most common entry systems, apartment buzzer systems are installed in buildings around the world.
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