The cost of the new door phone is about $995, including installation.

Video door phone at main door in every apartment.

There'd been a lot of that lately, closed door phone conversations that ended the moment I walked in.

On the other side of the double doors phones were ringing and people were shouting.

I said into the door phone.

Eric Forman, sales manager for CSI, said the company's video door phone could be hooked up to a homeowner's existing alarm system.

A special Door Phone may be added on extension 23 and the system may be connected to an electronic lock relay to allow the door to be opened via a Door Phone call.