NBN EN 301 657-2003 标准详情
- 标准号：NBN EN 301 657-2003
- 中文标题：
- 英文标题：Private Integrated Services Network (pisn); Specifications, Functional Models And Information Flows; Private User Mobility (pum); Call Handling Additional Network Features (anfs)
- 标准类别：比利时标准NBN
- 发布日期：
