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26GHz Local Multipoint Distribution System, "the standard number YD/T1186-2002. The standard sets out the work in the 26GHz band Local Multipoint Distribution System reference model, the working frequency band and channel configuration, operational capacity, interface requirements, wireless transceiver equipment requirements, performance requirements, network management functional requirements and the environment, power supply, safety and electromagnetic compatibility requirements. LMDS system also provides for the central station equipment, terminal equipment and relay stations equipment. for Public Telecommunications in the LMDS system, also available for private telecommunications networks for reference. "Asymmetric digital subscriber line voice separation technology requirements and testing methods," the standard number is YD/T1187-2002. The standards were applied to full rate ADSL and ADSL. Lites voice splitter and the side of the user interface side of the separation parameters of voice, audio transmission characteristics, ADSL band transmission characteristics, overvoltage protection, and the corresponding provisions of the testing methods. And expertise for public telecom networks full rate ADSL and AD SL. Lite mode and the user side of the side of voice splitter.