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Furthermore, the figure of 500,000 for Greater London is often confused with the figure for the police and local government operated cameras in the City of London, which was about 650 in 2011.home security systems ge
The doorbell housing 702 contains a camera module, an LED indicator, a processor and memory including programs executed by the processor. The doorbell camera 106 is electrically coupled to 1052 a remote chime 1006 via a bypass unit 1012 powered by a transformer 1010 that provides an input AC voltage. The remote chime 1006 is configured to ring 1054 in response to a user press on the doorbell button 1002. A supply monitoring signal is generated 1056 by the doorbell camera 106 based on the input AC voltage to indicate whether the input AC voltage is greater than a supply threshold. Based on a value of the supply monitoring signal, a user is notified by the doorbell camera 106 as to whether there is sufficient voltage to power the doorbell. In accordance with the supply monitoring signal, a message is presented by the doorbell camera 106 to a user of the doorbell camera 106 to indicate whether the input AC voltage is low with respect to the supply threshold.