This Recommendation defines the physical characteristics and call control procedures for a general purpose interface between DTE and DCE for user classes of service, as defined in Recommendation X.1, employing start-stop transmission. The formats and procedures for selection, call progress and DCE provided information are included in this Recommendation. The provision for duplex operation is covered.
ITU-T X.20 SPANISH-1988由国际电信联盟 IX-ITU 发布于 1988。
ITU-T X.20 SPANISH-1988 在中国标准分类中归属于: M14 通信网传输系统接口。
* 在 ITU-T X.20 SPANISH-1988 发布之后有更新,请注意新发布标准的变化。
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