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1)  wireless calling system
无线呼叫系统
2)  wireless calling serving system
无线呼叫服务系统
3)  distress radio call system
遇险无线电呼叫系统
4)  wireless emergency call system
无线紧急呼叫系统
5)  non-central-switch calling system
无主机呼叫系统
1.
Focusing on the problem that the several sets of non-central-switch calling system are not able to communicate with each other, which makes it difficult for managing and scheduling, the design of combining-separating machine in non-central-switch system developed.
针对多套无主机呼叫系统之间无法相互通信而给管理调度带来困难的情况,研制出无主机呼叫系统合并分离器,设计了其硬件和软件。
6)  wireless calling
无线呼叫
1.
Given that most current indoor calling systems are wire system, this paper introduces a design method of a wireless calling system which is made up of such chips as AT89C51,PT2272/2262 and ISD4003 with the circuit of system designing and software designing procedures given.
基于目前的室内呼叫系统多是有线系统,本文介绍了一种由AT89C51、PT2262/2272编译码器、ISD4003语音等芯片组成的无线呼叫系统的设计方案,并给出了系统设计的原理框图和软件设计流程。
补充资料:无线电通信波段(见无线电通信)


无线电通信波段(见无线电通信)
radio communication wave range

wuxiandian tongXin boduan无线电通信波段(rads。。ommunicationWaVe range)见无线电通信。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
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