Available...but not in the office

I am looking for a remote solution that will allow me to work from my home office yet still be included in the “in-office” environment. In my head, I can see a monitor/TV screen in the office that employees can use to “see” me in my remote office. If they need to ask me a question, they can stand in front of the monitor and be on camera so I can see them in my office. The connection would be live and constant. And if no one is in front of the camera the audio would still be captured so if I wanted to yell something out to the room, it could be heard. Is there anything like that being used?