GSM模块使用AT命令,是atv9这种,可以查模块的使用资料,去它生产厂商的网站找吧
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Series A Organization of the work of the ITU-T
Series B Means of expression: denitions, symbols, classication
Series C General telecommunication statistics
Series D General tariff principles
Series E Overall network operation, telephone service, service
operation and human factors
Series F Non-telephone telecommunication services
Series G Transmission systems and media, digital systems and
networks
Series H Audiovisual and multimedia systems
Series I Integrated services digital network
Series J Transmission of television, sound programme and other
multimedia signals
Series K Protection against interference
Series L Construction, installation and protection of cables and
other elements of outside plant
Series M TMN and network maintenance: international
transmission systems, telephone circuits, telegraphy,
facsimile and leased circuits
Series N Maintenance: international sound programme and
television transmission circuits
Series O Specications of measuring equipment
Series P Telephone transmission quality, telephone
installations, local line networks
Series Q Switching and signalling
Series R Telegraph transmission
Series S Telegraph services terminal equipment
Series T Terminals for telematic services
Series U Telegraph switching
Series V Data communication over the telephone network
Series X Data networks and open system communication
Series Y Global information infrastructure and Internet
protocol aspects
Series Z Programming languages
I T U - T R E C O M M E N D A T I O N S