I have a DoorBird for about a year which also rings my phone (<1 second delay) with a video call. It was for testing and while I thought it was going to be a gimmick I actually do enjoy having it. It means I get my parcels when I'm out.

I also have it integrated into Zoneminder for 'CCTV' motion recording which is quite neat, and it does SIP so I can get it to call my IP Phones too if I want to. I have used these on a few Control4 projects too for which there is an integration driver.

Plus, it's regular 802.3af PoE and has connection to my normal bell chime too. Awesome product.