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recently, shanghai police completed the whole network switching of the 350 mhz police digital trunking (pdt) system. the new pdt system has withstood the test of more than 8,000 users online and more than 150,000 calls per day, and the new system is running smoothly as a whole. as the brand provider and main member of the system construction, hytera has laid the foundation for the successful network switching through its leading pdt product technology, comprehensive solutions from system to terminal to application, and rich practical experience in network construction in first-tier cities.

the shanghai public security bureau's 350-megahertz tetra trunking system has been in operation for more than 14 years. in order to implement the "14th five-year plan for public security informatization construction" and the construction of a nationwide "one network" for the police digital trunking (pdt) system and other related work requirements, the shanghai public security bureau launched the project construction of the 350-megahertz pdt system to replace the tetra system in the entire network in october 2022. the pdt system needs to be interconnected with the ministry of public security, connected to the national network, and use domestic encryption technology and domestic cryptographic algorithm security systems to ensure that the wireless communications of the shanghai public security bureau achieve the overall goal of being safe, reliable, and autonomous and controllable.

as a megacity in china, shanghai has heavy daily police work and many security tasks, which places extremely high demands on the reliability, carrying capacity and continuity of the original tetra system docking services of the wireless communication system. during the construction of the pdt system, hytera formed an expert group to scientifically demonstrate frequency planning, user resource planning, base station infrastructure sharing, anti-interference measures and other solutions, conducted on-site surveys and docking service needs and tests, and carried out in-depth customized product development on demand. a series of meticulous work ensured the continuity and stability of various services of the shanghai public security bureau after the network transfer.

as the leading unit in the formulation of pdt standards, hytera has undertaken the construction of 350-megabit police pdt networks in more than half of the cities in china, and has won the full trust of customers with its excellent product quality and technical services. in the future, hytera will continue to promote the widespread application of pdt, comprehensive localization and upgrading of technical standards, and contribute to the realization of complete autonomy and control of public security wireless communications.