Video surveillance. Video surveillance and security "Chestnut." Intercom and Kiev, Ukraine. Installation.

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Access control systems - Are complex and multifaceted, electronic security systems. In fact, the conventional door lock or a mechanical turnstile with porter, too, are a kind of systems access control. First of all, the electronic system Access control provides the opportunity to access certain persons at certain premises and limits access of persons with no right of access to the appropriate zone.

More complex systems including, as a rule, one or more computers that can control access depending on the current time, day of the week and holidays. Such a system could keep the minutes of all the events: a specific user passes through a door at a certain time, unauthorized attempts access, etc. Software provision gives Various types of reports on developments occurred in the system for a certain period of time. Besides, different systems may have a wide range of additional functions, for example, protection against unauthorized access to the premises through the transfer card to another person, a graphical representation on a computer screen to display the plan object disturbing situations, etc.

In addition to its direct function in access computerized systems can be used to automatically track time, controls passage of a given Route guard, control various devices (sirens, lights, etc.) depending on the events occurring in the system. Many systems can connect sensors and fire alarm signaling and produce an alarm or control system surveillance. For example, when attempting illegal entry to the premises user (presentation of a system of illegal cards) to include VCR and record the actions of the attacker.

For organizations with large numbers of employees and visitors within the system Access control can be set up jobs on the operational �statement� Pass. Data on visitors or new employees entered into the database system access control, defines their authority to access in certain spaces and handed over the card passes. Duration of validity of these maps can be limited, and even in the case forgetfulness visitors through some time, the card will useless piece of plastic. In more complex systems may constructed picture owner of the card, but with the necessary text in a some other way affixed to the card. This image will be stored in a database and can be plotted on a computer screen, for example, upon presentation of an appropriate card reader at the entrance turnstiles.

Access control systems (SKD) can be classified into:

autonomous to manage one or more execution units, without the transfer of information at a central point of protection and without control by the operator;
central (network) - to manage the execution units to exchange information with the central point of protection and control system management by the operator on duty;
universal, including function as autonomous, so and network systems, operating in line under the leadership of the central control unit and move in an autonomous mode in the event of a failure rate in network equipment or a central device.

Generalized schematic diagram of all the above SKD same and includes the following units: