A monitoring and entry system presence service provides notification about
a trigger event to a user and performs actions based on user input.
Interface devices equipped with client applications capable of performing
actions such as VoIP calls, video calls, and the like, register with a
control and session layer, which facilitates interaction with a specific
presence application and an integrated presence service, such as a
doorbell application and a generic presence service. Upon determining the
location of a user, notification and a list of actions are provided
through a watcher client application. In response to the user selection,
actions are facilitated through the same network session(s).