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【国外标准】 Teleservices supported by an ISDN : Telephony 7 kHz teleservice
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2025-06-10
- ITU-T I.241.7
- 现行
- 定价：
- 在线阅读
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标准简介适用范围：
暂无
标准号：
ITU-T I.241.7
标准名称：
Teleservices supported by an ISDN : Telephony 7 kHz teleservice
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：
- 其它标准
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