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● shielding cabinet is a kind of cabinet, also known as electromagnetic shielding cabinet.

Shielding cabinet is an electromagnetic shielding cabinet that can be used to place computers, effectively suppress the leakage of computer electromagnetic information and prevent external strong electromagnetic disturbance from affecting the normal operation of computers.

● with the gradual deepening of people's understanding of the harm of electromagnetic leakage emission of classified information systems, various means to prevent electromagnetic leakage emission have been widely used in the construction of classified information networks, including the construction of electromagnetic shielding rooms, the laying of optical cables and shielded twisted pairs, the use of low radiation equipment, red and black power isolation sockets, and shielded cabinets.

● the shielding cabinet has the characteristics of small volume, convenient installation and flexible use, which is very suitable for those occasions that are not suitable for the installation of electromagnetic shielding room and need to provide protection for information equipment.

● however, in the actual test, it is found that the use effect of the shielded cabinet that has passed the strict test in the laboratory in the actual use environment often does not meet the design requirements, which makes many users have the phenomenon that the shielded cabinet can not effectively prevent electromagnetic leakage emission.

● after careful analysis, it is found that many users often use shielded twisted pair instead of optical fiber for cost considerations when connecting the communication lines of the equipment in the shielded cabinet. During the connection, only the shielding layer of the shielded twisted pair and the cabinet body are simply treated, and even the unshielded twisted pair is directly connected to the shielded cabinet.

● these practices will greatly reduce the shielding efficiency of the shielding cabinet, and even become the source of information leakage emission instead of providing protection. As shielded cabinets are used more and more widely, there are more and more misuses, and the problems are becoming increasingly prominent, there is a hidden danger of leakage.

● therefore, in actual use, we should refer to the use requirements of shielded cabinet, use optical fiber access, and pay attention to the treatment of metal wires in optical cables, which cannot enter the shielded cabinet together with optical fibers.

● shielding cabinet is a kind of cabinet, also known as electromagnetic shielding cabinet.

Shielding cabinet is an electromagnetic shielding cabinet that can be used to place computers, effectively suppress the leakage of computer electromagnetic information and prevent external strong electromagnetic disturbance from affecting the normal operation of computers.

● with the gradual deepening of people's understanding of the harm of electromagnetic leakage emission of classified information systems, various means to prevent electromagnetic leakage emission have been widely used in the construction of classified information networks, including the construction of electromagnetic shielding rooms, the laying of optical cables and shielded twisted pairs, the use of low radiation equipment, red and black power isolation sockets, and shielded cabinets.

● the shielding cabinet has the characteristics of small volume, convenient installation and flexible use, which is very suitable for those occasions that are not suitable for the installation of electromagnetic shielding room and need to provide protection for information equipment.

● however, in the actual test, it is found that the use effect of the shielded cabinet that has passed the strict test in the laboratory in the actual use environment often does not meet the design requirements, which makes many users have the phenomenon that the shielded cabinet can not effectively prevent electromagnetic leakage emission.

● after careful analysis, it is found that many users often use shielded twisted pair instead of optical fiber for cost considerations when connecting the communication lines of the equipment in the shielded cabinet. During the connection, only the shielding layer of the shielded twisted pair and the cabinet body are simply treated, and even the unshielded twisted pair is directly connected to the shielded cabinet.

● these practices will greatly reduce the shielding efficiency of the shielding cabinet, and even become the source of information leakage emission instead of providing protection. As shielded cabinets are used more and more widely, there are more and more misuses, and the problems are becoming increasingly prominent, there is a hidden danger of leakage.

● therefore, in actual use, we should refer to the use requirements of shielded cabinet, use optical fiber access, and pay attention to the treatment of metal wires in optical cables, which cannot enter the shielded cabinet together with optical fibers.