What is PDT digital trunking system?

PDT standard is a trunking communication standard with independent intellectual property rights in China. It focuses on the future development direction of digital intercom technology and can meet the needs of most users in the trunking communication industry.

PDT standard fully considers China's national conditions, draws lessons from and innovatively designs mature international standard technologies (such as Tetra, P25, DMR, MPT 1327, etc.). ), and follow the five principles of high cost performance, security, large-area system, scalability and backward compatibility to effectively solve the unified communication problems in various emergency communication networks.

PDT standard is led by the Ministry of Public Security of China, with Hainengda as the general team leader, and other manufacturers in the United Nations make joint efforts. PDT standard is divided into two parts: cluster standard and conventional standard, and backward compatible DMR standard protocol.

Members of PDT Alliance include Hainengda, Youneng, Sichuan Wade, Guangzhou Wade, Wang E Communication, Tianlitong, NTC and An Xun Network System. PDT standards are mainly aimed at public safety, public utilities, industry and commerce and other professional user groups.

PDT standard adopts TDMA (dual-slot) multiple access mode, channel spacing 12.5KHz, 4FSK modulation mode, and data transmission rate is 9.6 KB/s. It not only meets basic services, but also adds innovative functions such as simulcast and dynamic frequency resource management. The second phase standard of PDT will focus on improving the data transmission rate and the application of broadband service functions.

Extended data

Power grid patrol is the key field of daily command and dispatch in PDT communication system. Commanders can monitor the dynamic trajectories of all patrol vehicles and personnel in real time in the command hall, as well as police stations, 4G control points and high-definition video monitoring areas.

"PDT communication system" can also be deeply applied to the proper disposal of emergencies, and commanders can command nearby personnel to rush to the scene for disposal according to real-time monitoring. "PDT communication system" also makes the security and stability of various major events even more powerful. In more than 65,438+00 large-scale security activities, such as the "10,000-step" professional crowd walking incentive race and the "Silk Road" bicycle race.

All kinds of audio and images on the scene are transmitted to the command hall of the sub-bureau in real time through the "PDT communication system", which provides first-hand information for scientific research and accurate decision-making of the police situation, ensuring more scientific scheduling, more powerful command and more efficient support.

"Police wireless digital trunking (PDT) communication system" has realized the voice communication of public security wireless digital trunking, realized the function of short message group sending, realized the PGIS police officer, vehicle positioning function and vehicle history track playback function, and added the data encryption function.

And it can be interconnected with the national public security "PDT communication system" and send the instructions of the Ministry of Public Security directly to the personal walkie-talkie of the police in the sub-bureau, thus truly realizing the flat command and dispatch of police affairs.

Baidu encyclopedia -pdt