three-way calling

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。

Design of Wireless Calling System Based on ZigBee

基于ZigBee的无线呼叫系统的设计与实现

Design of a Wireless Calling System Based on ZigBee Technology

基于ZigBee技术的无线呼叫系统设计

ASIC Design of 433MHz-RFID System Based on MCU89C51;

基于89C51的433MHz-RFID无线呼叫系统的ASIC设计与实现

Distress Radio Call System

遇险无线电呼叫系统

marine calling and distress radio telephony frequency

海上呼叫和遇险无线电话频率

I'll use my car radio to call for help.

我现在就用车上无线电呼叫求援。

The wireless calls were soon responded to.

对无线电的呼叫不久有了回答。

Research on Call Admission Control in Cellular Wireless Communication Networks;

蜂窝无线通信网络呼叫允许控制研究

The Research on Wireless System Traffic Performance and Call Admission Control Scheme;

无线网络业务性能及呼叫接入控制研究

A Wireless Service System Based on Wireless Sensor Network

一种基于无线传感网的呼叫服务系统设计

Wireless Emergency Call System of Rest Home Based on ZigBee

基于ZigBee技术的养老院无线紧急呼叫系统

Call Admission Control Algorithm Based on VCG Mechanism in Wireless Networks

基于VCG机制的无线网络呼叫接入控制算法

Ham radio call sign on-line, indexed by call, name; and address.

无线电爱好者的电台呼叫信号一般是以呼号、姓名和地址来索引的。

called line identification facility

识别被呼叫线路设备

international radio call sign

《国际无线电呼号》

Are you receiving me? (said to sb to whom one is speaking on a radio transmitter)?

你能收听到我的声音吗（通过无线电发报机呼叫对方）

An unconditional RCS switchover drops calls that cannot be served by the other AP.

无条件的 RCS 切换会使其他 AP 不再用到的呼叫掉线。

urgent appeal for help or response(eg a radio broadcast to find relatives of a seriously ill person)

紧急求助或寻人呼叫（如为重病人寻找亲属的无线电广播）