Digital Security System. This digital video surveillance system consists Control Unit, a Doorbell Unit, an Accessory Camera Unit, and an Intercom Accessory Camera Unit with integrated motion sensors. The Control Unit displays live video footage of the visitor outside the door. The Doorbell Unit provides covert surveillance by taking a picture of the visitor when ringing the doorbell or if it senses movement.  It provides intercom communication between the user and the visitor while sending live video feed to the Control Unit. Additionally, the system provides for small surveillance cameras that can be placed near other doors or locations.