Universal Personal Telecommunication (UPT); The service concept; Part 3: Service aspects of charging, billing and accounting
通用个人电信(UPT);服务理念;第3部分:收费、计费和会计的服务方面
发布日期:
1992-12-01
检查UPT服务对收费、计费和会计的要求。
Examination of the requirements of the UPT service on charging, billing & accounting.