This kind of cell phone jammer has the high thermostability

the prison phone system is mainly shielded shielded shielded cell phone technology,
1, larger, solid structure, heat the larger, generally more important than six kilograms; 2, the device does not have an external power adapter, instead of using 220V power directly inside of the chassis, power supply has over voltage, under voltage and overload and short circuit protection; 3, non-professional human use professional tools and instruments, can not be adjusted to change the device output specification; 4, the shielding signal output interface should be a standard N head, antenna and equipment After separation using 50Ω cable; 5, inside the device by CDMA, GSM, DCS, PHS, 3G (CDMA2000/TD-SCDMA/WCDMA) various performance indicators and industrial grade power module as the core group of seven. This kind of    cell phone jammer has the high thermostability.Choosing a business cell phone shielding prison, prison cell phone shielding choosing a business, product pre-selected companies should do the work required to enter the prison-related business and technical personnel on-site or simulated on-site and explain technical solutions, equipment and anti-shielding effect of the actual destruction of performance demonstration. Through this work, understand the relevant business technology equipment performance, prepare for the selected brand, ensure that the project has achieved good results. Eight. Relevant recommendations of the prison phone system shielded a) 1. The prison phone system requires the prison phone shielding shielding effect in the current system requires all public domestic mobile telecommunications standard CDMA, GSM, DCS, PHS, 3G (CDMA2000/TD-SCDMA/WCDMA), and shall not affect other electronic equipment within the prison system to normal operation;  cell phone jammer has no frequency drift. 2. dormitories range (including but not limited to the kennel aisle, corridor, window, etc.), the effective shielding rate should reach 99.9%; 3.4. production area , the effective shielding rate should reach 99%; confined small space (including but not limited to conversations rooms, storage rooms, toilets, etc.) and more subtle irregularities likely place to effectively shield the rate should reach 99.9 percent or more; 5 unshielded area (including but not limited to the administration building, armed police units or buildings and the surrounding living spaces, etc.), must ensure smooth communication; 6.7 8. shielding effect is attained, the site must be shielded electromagnetic radiation safety testing ; full retention device output redundancy, improve service life and adapt to the future development requirements; centralized power supply system must be used. The good    cell phone jammer    company is complete in the organization structure.b) 1. 2. 3. the prison phone system, follow the relevant standards shielded cell phone shielding system according to the relevant prison standards GB 8702-88 GB 9175-88's Republic of China People's Republic of radiation protection standards for environmental health airwaves GA / T 75 - 2000 Security Project procedures and requirements 4. 5. 6. 7. 8. 9. 10. JCJ / T 16-92 civil electrical design specifications of the phone screen monitoring system standard "Police Technology" GB / T 50311-2007 building and buildings cabling system design specification GB / T 50312-2007 for building and cabling systems engineering acceptance YD / T 5120-2005 indoor wireless coverage systems engineering design specifications YD 5039-97 Communication Engineering Construction and Environmental Protection Technology provides YD 5098-2005 Communications Authority (station) the grounding lightning protection and grounding specifications.The good    cell phone jammer    company has the specific research and development force.