工学 通信系统 释 public switched telephone network，PSTN 公用交换电话网 进行交互型话音通信、开放电话业务的公众网。是一种全球语音通信电路交换网络。
网络与数据通信 协议体系与组成结构 释文 public switched telephone network 公用交换电话网
- domain of definition
- domain of dependence
- domain of determinacy
- domain of determination
- domain of discontinuity
- domain of ellipticity
- domain of existence
- domain of finite type
- domain of holomorphically convex
- domain of holomorphy
- domain of hyperbolicity
- domain of imprimitivity
- domain of independence
- domain of indexes
- domain of individuals
- domain of infinite connectedness
- domain of influence
- domain of integration
- domain of integrity
- domain of meromorphy
- domain of normality
- domain of rationality
- domain of regularity
- domain of speech
- domain of transitivity