The definition of a digital channel is given in Recommendation M.300.Procedures in CCITI Recommendation M.555 for bringing-into-service digital blocks and digital paths are adequate to ensure satisfactory operation of digital channels which are provided on the respective digital blocks or paths.No specific tests are required for individual digital channels.
ITU-T M.556-1988由国际电信联盟 IX-ITU 发布于 1988。
ITU-T M.556-1988 在中国标准分类中归属于: M32 数据通信设备。
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