Can several DoorBird indoor stations be added to one outdoor station? Yes, you can add multiple DoorBird indoor stations to a single outdoor station.This allows for more complex installations such as rental properties and superstructures.See also: How can DoorBird be used in a multi-party building (superstructure) or apartment building? Published: 30/09/2020 13:52 Can several DoorBird outdoor stations be accessed on one indoor station? Where can I find the installation manual for the A1121 series?