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- ITU-T Q.120-139 Specifications of Signalling System No. 4

【国外标准】 Specifications of Signalling System No. 4
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2025-06-10
- ITU-T Q.120-139
- 现行
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标准号:
ITU-T Q.120-139
标准名称:
Specifications of Signalling System No. 4
英文名称:
标准状态:
现行-
发布日期:
2025-11-01 -
实施日期:
出版语种:
- 其它标准
- 上一篇: ITU-R M.1651 A method for assessing the required spectrum for broadband nomadic wireless access systems including radio local area networks using the 5 GHz band
- 下一篇: ITU-R BR.1694 Videocassette recording formats for international exchange of large-screen digital imagery programmes intended for presentation in a theatrical environment
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