Hi @manganwjr. Yes, the motion detection on your Security Cameras will not trigger the siren on the Ring Alarm, only the Alarm Contact Sensors and Motion Detectors will. Manually activating the siren on your Security Camera does not trigger the siren on the Ring Alarm. You do also have the option to link your Ring Alarm to your Security Cameras so that the sirens on the Cameras will go off when the Ring Alarm is triggered. I hope this helps answer your questions. 