【国外标准】 Support of X.21, X.21 bis and X.20 bis based Data Terminal Equipments (DTEs) by an Integrated Services Digital Network (ISDN)
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2025-10-22
- ITU-T X.30
- 现行
- 定价: 无文本
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适用范围:
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标准号:
ITU-T X.30
标准名称:
Support of X.21, X.21 bis and X.20 bis based Data Terminal Equipments (DTEs) by an Integrated Services Digital Network (ISDN)
英文名称:
标准状态:
现行-
发布日期:
2012-03-01 -
实施日期:
出版语种:
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