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With crime rate increasing around the city, the police and safety patrol agents in the city insist residents to install surveillance cameras with back up memory options. These not only help keep an eye on any suspicious activity, sometimes also helps to playback the old footage and check of repetitive suspicious activity. There are few different types of surveillance cameras like outdoor surveillance cameras that are kept in the streets which are used to track traffic violators and other anti social activities. Domestic cameras which are positioned inside the homes but facing towards the periphery to keep a watch on home intruders and thieves. There are also few nest cameras which can be kept within the home or store to monitor activities of workers or nannies. In the market we can find many more such cameras which are specific to purpose.security alarm monitoring
Referring to FIGS. 9F and 9G, the doorbell camera 106 may include a stack 910 of electronic and optical components. The stack 910 is securely enclosed within the device housing 702 when the front cover plate 708 is assembled onto a body of the device housing 702. In some implementations, the stack 910 of electronic and optical components are assembled prior to being enclosed within the device housing 702. In some implementations, the electronic and optical components are sequentially disposed into the body of the device housing 702 to form the stack 910 that are thereby enclosed within the device housing 702 when the front cover plate 708 in assembled onto the body of the device housing 702. FIG. 10C is a block diagram of a doorbell camera system that has a voltage monitoring unit in a doorbell camera in accordance with some implementations. FIG. 10D is a block diagram of a doorbell camera system that has a voltage monitoring unit in a bypass unit in accordance with some implementations. FIG. 10E is a flow chart of a method for controlling a doorbell camera in accordance with some implementations.