If you have 24x7 Central Monitoring, your house is monitored by a team of experienced security experts. When an alarm is triggered, they will attempt to contact you to verify that you need assistance and, if needed, the emergency services will be dispatched.
If they are unable to contact you, they will dispatch emergency services immediately.
If you do not have Central Monitoring, you will receive alerts when an alarm is triggered and you will need to contact the emergency services (911) yourself.