Then they can do like shops do and put a little bell on it.
The buzzer is there so they can let people they deem not a threat in.
And if they have deemed a person not a threat then the signing in is just a formality.
And the people in the office were upset that rather then her coming to worship at their feet first she went to her child.
The rest of it is just hooey.
The office isn’t like an armed guard shack, where the guy sits there and watches constantly. The office can have someone running over to the nurses office, getting something from the copy room, or even showing a parent part of the way to where they are going.
A jingling bell wouldn’t allow for any control in those situations. Someone would have free and unhindered access and the office personnel would have to hope they heard the little bell ... LOL ...
The way it IS DONE will sometimes mean the person is standing there for a minute or two, until they are available and ready to monitor your entrance. They are ready, at that moment to immediately call the police if necessary and I would imagine they also have an automatic dialer and message for emergencies. A little jingling bell just wouldn’t do it.
The process of not deeming the person a threat would occur in the office when they verify the person and check the records for if the person has access to the kid in question.
The signing in is to provide the record for the transaction, so that if something happens after the fact, they can go back and check to see who has been coming and going. At my school you have to “check out” too. And you date and time the “in” and “out”.