Those of the following definitions that concern links or sections apply,unless otherwise stated,to the combination of both directions of transmission.A distinction between the two directions of transmission may,however,be necessary in the case of unidirectional, multiple-destination links or sections set up over multiple-destination communication satellite systems.
ITU-T M.300-1988由国际电信联盟 IX-ITU 发布于 1988。
ITU-T M.300-1988 在中国标准分类中归属于: M17 传输系统组群、频谱安排。
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