Private Telecommunication Network (PTN); Specification, functional models and information flows; Control aspects of circuit mode basic services
专用电信网(PTN);规范、功能模型和信息流;电路模式基本服务的控制方面
发布日期:
1992-12-01
基本通话的第1和第2阶段。第1阶段和第2阶段的定义见ENV41005。
Stages 1 & 2 for basic call. See ENV41005 for definition of stages 1 & 2.