2) 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。
4) three-way calling
三线呼叫
5) internal call
内线呼叫
6) External Call
外线呼叫
补充资料：呼叫
1.大声叫喊。 2.电台上用呼号叫对方。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条