The CCITT recognizes the types of sound-programme circuits defined below. Note–For the purposes of this Recommendation and other Recommendations in the Series J, soundprogramme circuits have been classified in terms of the nominal effectively transmitted bandwith. For convenience, the corresponding type of circuit from the administrative point of view (see Recommendation D.180 [1]) is given under each type of equipment in the following paragraphs.
ITU-T J.12 FRENCH-1988由国际电信联盟 IX-ITU 发布于 1988。
ITU-T J.12 FRENCH-1988 在中国标准分类中归属于: M11 通信网技术体制,M42 通信线路设备。
* 在 ITU-T J.12 FRENCH-1988 发布之后有更新,请注意新发布标准的变化。
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