neighbourhood telephone answering services

The receiving circuit of the pager is applied in the PDA of the railway communication information systems so that the information in the system can be refreshed.

交通信息系统PDA为了使内部信息具有实时性,并为降低服务成本,不使用GPRS或其它更新方式,而是使用传呼接收电路,实时更新铁路、民航交通信息。

The receiving circuit of the pager is applied in the PDA (Personal Digital Assistant) of the railway communication information system so that the information in the system can be refreshed.

铁路交通信息系统PDA为了使内部信息具有实时性 ,在系统内部增加传呼接收电路 ,从而可以实时更新铁路、民航交通信息。

Implementation of a New Server System for E mail to Pager;

一种新型电子邮件自动传呼系统的实现

A cable call interactive conversation system controlled by single chip microcomputer and used by DTMF encoding technology is introduced,and the system principle,interface of MCS-51 single chip computer with MT8880 and address identification circuit of slave-machine are discussed in this paper.

介绍一种由单片机控制、采用ＤＴＭＦ编码技术的有线传呼对讲系统，重点讨论系统原理、ＭＣＳ－５１单片机与ＭＴ８８８０的接口及副机地址识别电