【国外标准】 Typical DSS 1 service indicator codings for ISDN telecommunications services
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- ITU-T Q.939
- 现行
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暂无
标准号:
ITU-T Q.939
标准名称:
Typical DSS 1 service indicator codings for ISDN telecommunications services
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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