Alarm vs Notify?

For the security system, will a camera motion set off the alarm, or can I set the camera to notify only? Not sure if I want any cameras to generate an alarm and the monitoring company to send the police when a camera detects motion...Also, can I set/program a door sensor to notify only and not generate an alarm? For example, I want all door and window contacts on my house alarmed, but I want a sensor on the gate to the yard to notify me when the gate is opened and not send an alarm.