ITU-T Q.400-Q.490-1988
R2信令系统规范.11号研究组[作废的:ITU-T Q.411;ITU-T Q.412;ITU-T Q.414;ITU-T Q.415;ITU-T Q.416;ITU-T Q.421;ITU-T Q.422;ITU-T Q.424;ITU-T Q.430;ITU-T Q.440;ITU-T Q.441;ITU-T Q.442;ITU-T Q.450;ITU-T Q.451;ITU-T Q.452]

Specifications of Signalling System R2 Study Group XI [Superseded: ITU-T Q.411 ITU-T Q.412 ITU-T Q.414 ITU-T Q.415 ITU-T Q.416 ITU-T Q.421 ITU-T Q.422 ITU-T Q.424 ITU-T Q.430 ITU-T Q.440 ITU-T Q.441 ITU-T Q.442 ITU-T Q.450 ITU-T Q.451 ITU-T Q.452 ITU-T Q.

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标准号

ITU-T Q.400-Q.490-1988

发布日期

1988年

实施日期

废止日期

无

中国标准分类号

M11;M12

发布单位

IX-ITU

适用范围

Signalling System R2 is used as an international signalling system within international regions (world numbering zones). Moreover, System R2 can be used for integrated international/national signalling if it is employed, in conformity with the present specifications, as a signalling system in the national networks of the region concerned. Suitable for both automatic and semi-automatic working it offers a high reliability in transmission of the information necessary for setting up a call. It allows for rapid call set-up and provides sufficient signals in both directions to permit the transmission of numerical and other information relating to the called and calling subscribers' lines and to increase routing facilities.

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