31.2.3 Rear PanelFigure 1- 3No. Component Name Note1 Camera AngleAdjustment Adjust camera angle.2 Vandal-proofSwitchWhen VTO if forced to leave wall, it will alarm andreport to MGT center.3 User Port Connect to lock, door sensor feedback and unlockbutton.4 Project Port Reserved for project staff use.1.3 System NetworkingThis chapter mainly introduces usage of digital VTO, please read the following contentand install the device according to your actual condition.