Access Control 26
Access Control 26 : Physical security: (6) Access control system topologies: Access control System Using Serial Controllers: (7) IP Readers: Advantages: (a) Most IP readers are PoE capable. This feature makes it very easy to provide battery backed power to the entire system, including the locks and various types of detectors (if used). (b) IP readers eliminate the need for controller enclosures. (c) There is no wasted capacity when using IP readers (i. e. a 4-door controller would have 25% unused capacity if it was controlling only 3 doors). (d) IP reader systems scale easily: there is no need to install new main or sub-controllers. (e) Failure of one IP reader does not affect any other readers in the system
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