After a large number of standalone full-band signal blockers are implemented, especially when multiple buildings in a monitoring area are shielded, it becomes difficult to centrally and uniformly open and close them. Even with the use of unified power lines and designated personnel responsible for timely operation, it is impossible to determine the working status and malfunctions of all full-band signal blockers. When all signal blockers are activated, the management personnel are unable to promptly determine whether the blockers at each location are functioning properly. This lack of energy efficiency and environmental friendliness is also detrimental to equipment maintenance.
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Keeping all full-band signal blockers in a constantly activated state is not conducive to energy conservation, environmental protection, equipment maintenance, and the lifespan of the devices. For areas such as factory zones, cafeterias, and warehouses that are unoccupied at night, there is no need for the full-band signal blockers in these locations to operate continuously for 24 hours every day. Inconvenience in group control or point-to-point control is also a drawback. It is not possible to precisely control the timing of opening and closing in any arbitrary group or point-to-point manner. Furthermore, it does not prevent intentional damage to the full-band signal blockers. In cases where prisoners or prison guards intentionally destroy or cut off the power supply, affecting the normal operation of the signal blockers, the management personnel are unable to promptly determine and be informed. The process of manually shutting down the full-band signal blockers cannot be traced and investigated. For more sophisticated acts of destruction by prisoners or prison guards, it is impossible to trace and investigate them. For example, some prison guards may cut off the power supply to the signal blockers during unsupervised nights and restore normal power supply the next morning.