ETR 004 Ed.1 标准详情
- 标准号:ETR 004 Ed.1
- 中文标题:
- 英文标题:Business Telecommunications (BT); Overall transmission plan aspects of a private branch network for voice connections with access to the public network
- 标准类别:其他国内外OTHERSS
- 发布日期:
Recognises the overall responsibility of administrations for ensuring that the quality of national communications follows international quality objectives. Contains three sections- Scope, introduction and principal recommendations; General Guidance a
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