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- ITU-T I.252.1 Call offering supplementary services : Call Transfer

【国外标准】 Call offering supplementary services : Call Transfer
本网站 发布时间:
2025-06-10
- ITU-T I.252.1
- 现行
- 定价: 无文本
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适用范围:
暂无
标准号:
ITU-T I.252.1
标准名称:
Call offering supplementary services : Call Transfer
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:
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