Time delay before intercom notifies

Hi there! I recently have an intercom and I live in a building.Many times the postman or the people who leave advertising in the mailboxes, ring the doorbell (very very briefly) of several neighbors so that someone opens ASAP because ther're working.A delay option would be interesting to avoid these short warnings, so it just notifies if the intercom has been pressed for more than "x" milliseconds.