
【国外标准】 Mobility and modification supplementary services : In-call modification (IM)
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2025-06-10
- ITU-T I.258.2
- 现行
- 定价: 无文本
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适用范围:
暂无
标准号:
ITU-T I.258.2
标准名称:
Mobility and modification supplementary services : In-call modification (IM)
英文名称:
标准状态:
现行-
发布日期:
2021-02-01 -
实施日期:
出版语种:
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