1. Family 1: Connect the monitors to the whole IP system by wire
   There are 3 ways for residents to enjoy APP function
   (1) At home using Wi-Fi to link monitors with Private Internet/Router only. When there is a call from door station, monitor will divert the call to app.
   (2) The outside PoE switch are connected to Common Internet/Router. When there is a call from door station, door station will divert the call to app.
   (3) Both Private Internet and Common Internet are connected. When there is a call from door station, at first monitor will divert the call to app, if it fails then door station will take over and divert the call.

2. Family 2: Connect the monitors to the whole IP system by wireless
   To enjoy APP function, it is the only way that, the outside PoE switch should be connected to Common Internet/Router.

DHCP Router assigns IP address for all devices connected.