
PRIVATE INTEGRATED SERVICES NETWORK (PISN) - SPECIFICATION, FUNCTIONAL MODEL AND INFORMATION FLOWS - DO NOT DISTURB AND DO NOT DISTURB OVERRIDE SUPPLEMENTARY SERVICES
出版:German Institute for Standardisation (Deutsches Institut für Normung)

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PRIVATE INTEGRATED SERVICES NETWORK (PISN) - SPECIFICATION, FUNCTIONAL MODEL AND INFORMATION FLOWS - DO NOT DISTURB AND DO NOT DISTURB OVERRIDE SUPPLEMENTARY SERVICES
出版:German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频