Cell Phone Number Block Telemarketers Cripples Phone Functionality
Where Cell Phone Number Block Telemarketers is needed: The work environment certainly is. Email and internet are necessities in most offices. But what about cell phones? For the office, convenient use of computers will weaken the function of mobile phones, and frequent use of mobile phones will also distract some people and reduce work efficiency. Therefore, many companies prohibit the use of mobile phones during working hours. regulations. Especially in the unit, once the unit staff accidentally leaks the work content, it is easy to be stolen by criminals. This is a very dangerous thing for the unit. In order to prevent such incidents from happening, the unit will be equipped with cell phone jammer or mobile phone signal shielding cabinets to avoid leakage.
The entire frequency range of electromagnetic waves ranges from a few Hz to hundreds of GHz, and each segment can be used as a communication signal. However, except for a few very professional devices, ordinary mobile phone jammers are "not loud enough" and "not perfect", a Cell Phone Number Block Telemarketers can only block a small part of the frequency band, and communication tools can use unshielded frequency bands for communication. Of course, the 2G, 3G, and 4G mobile phone businesses of several domestic communication companies are all concentrated in a few small frequency bands. Mobile phone jammers in the exam room can still focus on these frequency bands.