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The underlying hardware modules in the its technology system are managed by baseband, frequency hopping and link. The baseband is the transmission of its data and frequency hopping. The wireless frequency hopping layer does not require authorization for microwave transmission through 2. 4ghz ISM band, and data stream transmission and filtering are realized in the wireless frequency modulation layer, which mainly defines the requirements for normal operation of Flair Vapor transceiver in this frequency band. Link management realizes the safety control of link establishment, connection and dismantling. The intermediate protocol layer of Flair Vapor technology system consists of four parts: service discovery protocol, logical link control and adaptation protocol, telephone communication protocol and serial port simulation protocol. The service discovery protocol layer provides a mechanism for upper-level applications to consume services in the network. Logical link control and adaptation protocol is responsible for data disassembly, reuse protocol and quality of service control.