PDT (short for Professional Digital Trunking or Police Digital Trunking ) is an open industry standard for trunked radio system in China servicing police wireless communications and professional mobile radio . The standard is being maintained by the Professional Digital Trunking System Industry Association , an association of major vendors of wireless communications equipment in China. The association was formed with the help from Information and Communications Bureau of the Ministry of Public Security . The standard was used to facilitate the digital transformation of the Ministry's existing MPT analogue trunking system. Government policy supporting this domestic standard had led to the abolishment of previous GA/T industry standards based on the European TETRA standard .
8-417: The initial major contributor of the standard were Hytera Communications and Vigor Communications(WANGE). Vigor was also the first enterprise to produce PDT two-way radio products. PDT features an all- IP architecture with independent control and carrier, independent call processing and service switching. It is based on the universal SNMP network management standard. It supports various networking modes and
16-613: Is a stub . You can help Misplaced Pages by expanding it . Hytera Communications Hytera ( Chinese : 海能达 ; pinyin : Hǎinéngdá ; previously HYT ; SZSE : 002583 ) is a Chinese publicly traded and partly state-owned manufacturer of radio transceivers and radio systems founded in Shenzhen , Guangdong in 1993. Hytera is listed on the Shenzhen Stock Exchange and is partly owned by Shenzhen Investment Holdings of Shenzhen's municipal government . Hytera
24-536: Is highly scalable. It uses a distributed system architecture and a multi-layered fault mitigation design for high reliability and efficiency. Hardware platforms are built with universal devices such as switches and routers, based on mature technologies and low costs. It uses a module-based design and supports customizable system functions. The core network is interoperable with different systems such as DMR ( Digital Mobile Radio ) and Tetra ( Terrestrial Trunked Radio ). This People's Republic of China -related article
32-749: Is major contributor to the PDT Standard , which is designed for public safety organizations in China. The company is a major supplier to China's Ministry of Public Security . The company's head office is in Shenzhen, China. Hytera's products are developed at three development sites in total. One of the development sites is located in Bad Münder, Germany. In March 2012 Hytera acquired the German company Rohde & Schwarz Professional Mobile Radio GmbH from
40-633: Is the defendant, as well as the plaintiff, in ongoing intellectual property litigation with Motorola Solutions . Hytera is also a plaintiff of an antitrust lawsuit against Motorola Solutions. In February 2022, Hytera was criminally indicted in United States District Court for the Northern District of Illinois under charges of technology theft. In April 2024, the court ordered the company to immediately stop selling products worldwide. An appellate court granted Hytera
48-478: The 2019 National Defense Authorization Act (NDAA) to not do any business with U.S. federal agencies due to national security and human rights concerns. On May 27, 2020, Hytera America and Hytera America (West) filed for Chapter 11 bankruptcy citing ongoing lawsuits brought by Motorola Solutions and the impact of the COVID-19 pandemic . On January 12, 2021, Hytera US Inc., a new subsidiary of Hytera's in
56-503: The German electronics group Rohde & Schwarz , which is now known as Hytera Mobilfunk. In addition, there are Hytera subsidiaries in the US, UK, Canada, and Spain. In June 2007, Hytera acquired Marketronics Corporation, now known as Hytera America, Inc., located in Miramar, Florida . In 2019, Hytera and several other Chinese-based companies, including Huawei , were placed on a ban list of
64-763: The U.S., set up following the court procedures, officially began to operate its business. In March 2021, the Federal Communications Commission (FCC) declared that Hytera video surveillance and telecommunications services and equipment "pose an unacceptable risk to U.S. national security.” After President Joe Biden signed into law the Secure Equipment Act of 2021 , in November 2022, the FCC banned sales or import of equipment made by Hytera for national security reasons. The company
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