Digital trunking refers to a "specialized mobile communication system". Digital trunking communication is a new type of mobile communication system that emerged at the end of the 20th century. In addition to providing personal mobile communication services that can be provided by public mobile communication networks (GSM, CDMA), it can also achieve arbitrary communication between individuals and groups, and can be independently programmed. It is an intelligent communication network that integrates walkie talkies, GSM, CDMA, and image transmission. The technical characteristics and advantages of digital trunking communication determine that it not only has all the functions of personal communication, but also can control and achieve arbitrary communication between individuals and groups, with high confidentiality and rich functions, truly achieving comprehensive intelligence of communication. Internationally renowned digital trunking standards include the TETRA system developed by the European Telecommunications Standards Institute (ETSI) and the iDEN system in the United States, APCO Project25 in North America, FHMA in Israel, DMR in Europe, and PDT in China. The digital trunking system submitted to the International Telecommunication Union (ITU) is included in the digital trunking report, including 7 technical systems such as the Project25 scheduling system in the United States and the Pan European TETRA system. This is also one of the main digital trunking mobile communication systems internationally
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China