【摘要】 在研究智能型无主机扩音对讲电话系统的基础上 ,研制了具有拨号功能的无主机扩音对讲电话通信系统 .该系统利用DTMF(双音多频 )信号传输信令 ,实现了单呼、群呼和全呼 3种工作方式 ,提高了呼叫通信的针对性 .设计了系统硬件和软件 ,并从软、硬件方面采取了抗干扰措施 .更多还原

【Abstract】 Based on the telephone system of intelligent non-central-switch amplifying calling and telephone talking, a non-central-switch amplifying call and talking telephone system with dialing is developed in this paper. The transferring signaling is DTMF one. Based on the design of the infrastructure of the system, the authors design the hardware, program the software and take the anti-interference measures for both the hardware and the software.更多还原