For devices which permanently store the key, there is no risk because of connection problems or manual reconnection, in this way, no new PIN authentication is triggered. But will make use of the key that is stored on both devices. It’s safer for peers to permanently store these details in the settings and disable re-authentication by a PIN.
In addition, users should use PINs with significantly more than eight characters in length, if the software used permits. The Bluetooth protocol allows up to 16 characters of any kind before (128 bit). In addition, should an unexpected invitation to re-authenticate the phone notifies by beeping.
In a networked system, all controllers and Router Change Management are connected to the computer, which has many advantages for large enterprises, but it is not needed for the one-door access control. Network systems are suitable for large complexes (manufacturing plants), because when they need to manage a dozen doors that are running stand-alone systems, it becomes extremely difficult.
Network system are used for the following purposes: when you need information about events that occurred earlier (event archive) or requires additional monitoring in real time. When you want to organize a time tracking and monitoring of labor discipline and when you want to ensure interoperability (integration) with other security sub-systems such as video surveillance or fire alarms.
In a networked system, you can not only control events throughout the protected area from one place, but also centrally manage user rights, maintain the database. Networked access control systems allow you to organize multiple jobs, by dividing the control between different staff and services of the enterprise.
Wireless technology may be used in the network access control systems, the so-called radio channels. The use of wireless networks is often determined by specific situations: difficult or impossible to lay wired communication between objects, reducing the financial costs of the installation of doors, etc. There are many variants of radio channels.
Bluetooth. This type of wireless data transfer device is an analog Ethernet. Its peculiarity lies in the fact that there is no need to lay parallel communication for combining the components using the RS-485 interface.
Wi-Fi. The main advantage of this technology is a long-range communication system capable of up to several hundred meters. This is particularly necessary to interconnect objects at large distances. This reduces both time and financial cost of installing street communications (Router Change Management).
Initially the scope of this technology was burglar and fire alarm systems. Now ZigBee can be used in access control systems. This wireless technology operates in the unlicensed 2.45 GHz frequency range.
Leave a Reply