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【国外标准】 Business TeleCommunications (BTC) - Transmission characteristics of digital Private Branch eXchanges (PBXs); English version ETS 300439:1996
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2025-06-05
- DIN ETS 300439
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标准简介适用范围：
暂无
标准号：
DIN ETS 300439
标准名称：
Business TeleCommunications (BTC) - Transmission characteristics of digital Private Branch eXchanges (PBXs); English version ETS 300439:1996
英文名称：
标准状态：
废止-
发布日期：
2001-11-01 -
实施日期：
出版语种：
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