子母机、小灵通、大哥大(手机)分别是无绳电话、无线市话及移动通信的俗称。它们在各自通信领域扮演不同角色,为人们提供方便、灵活、快捷的通信手段。本文就它们之间的有关情况予以介绍。 一、三者的通信组成方式 1.子母机通信以公众电话交换网(PSTN)的市话交换机(LE)为依托,利用传统的模拟铜双绞线与母机相连,母机与子机之间则采用调频无线通信。其组成方式见图1所示。按照频 Mother machine, PHS, big brother (cell phone) are cordless phones, wireless local calls and mobile communications commonly known. They play different roles in their respective fields of communication, providing people with convenient, flexible and efficient means of communication. This article describes the situation between them. First, the three components of the communication 1. Motherboard communication to the Public Switched Telephone Network (PSTN) Local Switch (LE) as the basis, the use of traditional analog copper twisted pair connected with the parent machine, then use between the parent machine and the child machine FM wireless communications. The composition of the way shown in Figure 1. Follow the frequency