21.2.2 Front PanelFigure 1- 2No. Port Name Note1 MIC Audio input.2 Camera It monitors corresponding door region.3 CompensationLightLight compensation will automatically turn onduring monitoring, calling, or connecting status ifthere is no enough light in environment.4 Speaker Audio output.5 User Nameplate Display username and other info.6 Call Button Call center or VTH.