Dahua DHI-KTA01 - Wiring Preparation

Installation and Wiring 7
Figure 2-4
2.2 Wiring Preparation
Before wiring, you need to know port connection rules and cord specifications.
2.2.1 Port Connection Rule
Figure 2-5
 4-wire port A of a video intercom can be connected to 4-wire port C of another video
intercom to do data communication;
 4-wire port B of a video intercom can be connected to 4-wire port D of another video
intercom to do data communication;
 4-wire port A of a video intercom cannot be connected to 4-wire port B or D of another
video intercom to do data communication;