It works similarly to a walkie-talkie, where one user can initiate a call to another user and they can communicate in real-time. This feature is useful for small businesses where employees need to communicate quickly and directly with each other, such as when one employee needs assistance from another.

In a dental office, the Intercom feature can be useful for quickly and easily communicating with other staff members during a patient visit. For example, a receptionist might use the Intercom feature to alert the dentist that a patient has arrived, or a dental hygienist to request additional instruments or supplies. 

The Intercom feature is a powerful tool that allows for fast, efficient communication in a variety of different settings, and it can be a valuable addition to any business or organization.