振铃机

A simplified non-ringing extension to which a local serial data terminal is attached.

一种可连接本地串行数据终端的简化非振铃扩展机。

The automatic two-way signaling used on these circuits causes the station instrument on one end of the circuit to ring when the station instrument on the other end goes off-hook.

这些线路上使用的自动双向信令引起线路一端的电话机振铃，而另一端的电话机摘机应答。

Complete to stir telephone into the telephone the information carries on the DTMF/ FSK decoding manifestation, speech report number and flaps the bell signal of examination and count, hint the sound to broadcast, record sound the playback and hang the machine examination and record sound information manifestation etc..

系统以凌阳SPCE061A十六位单片机作为主控MCU，配合1420录音芯片、LCD显示模块、键盘模块、DTMF编译码等完成对拨入电话的来电信息进行DTMF/FSK解码显示、语音报号、振铃信号的检测及计数、提示音播放、录音放音及挂机检测、录音信息显示等。

This literary grace uses to divide a piece modes, proceeding the analysis to the hardware design of whole system, and System diagram, dial up circuit , hang up circuit , ring detecting circuit, voice unit circuit are provided .The system makes use of serial communication .

本文采用分块的模式，对整个系统的硬件设计进行分析，分别给出了系统总体框图、振铃检测电路、摘/挂机控制电路、DTMF信号转换电路、语音单元的电路，并对相应电路设计进行相关的阐述。

The open design methods, user-friendly according to our own needs, for various extensions, and includes common interfaces. mainly covers the right ring tone detection circuit design, automatic Abstract hook, Transceivers serial communication theory, AT89C51 control circuit characteristics of the structure and principle C language of communication microcontroller programming software design; Due to the communication process interference factors exist, Therefore, the circuit design using the interference method.

采用开放式的设计方法，便于用户根据自身需求，进行各种扩展，包含常用接口，主要包括对振铃音的检测电路的设计，自动摘挂机，收发器串行通信的设计，控制电路AT89C51单片机和固态继电器，用C语言实现单片机下的软件编程，由于考虑到通信过程中存在干扰因素，所以对电路采用抗干扰设计的方法。

Station "A" rings Station "B" when Station "A" goes off hook, but Station "B" cannot ring Station "A".

但A电话机摘机而B电话机不能引起A电话机振铃时，而A电话机将使B电话机振铃。

A telephone remote control and alarm device, which belongs to field of intelligent appliance and family security system, which is characterized in that data is accessed to a management chip to realize ring detection and automatic pick-up hang-up, the telephone line is connected with a dual-tone receiving-transmitting chip, a sound chip and a single-chip.

一种电话远程控制和报警装置，属于智能家电和家庭安防系统领域，其特征在于，数据接入管理芯片实现振铃检测，自动摘挂机，并将电话线路与双音频收发芯片、语音芯片以及单片机连通。

A switchboard each other: Any ringing telephone exchange, switchboard to other machines to answer the call

总机互答：任意总机振铃，其他总机提机即可接听电话。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。