Video Doorbell

Does it have a solution for a video doorbell? A residence is on the second floor commercial building in the city. It’s a long walk down the steps, and sometimes a passerby will ring the bell. It would be nice to see who is at the door, if anyone.

I’ve used these in the past as a video doorbell. http://www.optexamerica.com/security-products/ivision The installation is pretty easy and the device itself is really easy to use.