我们利用TP801单板机实现了对纵横制小交换机的用户分级管理。将用户分成三类:A类——有权呼叫外线(拨市话局),允许挂长途;B类——允许呼叫市话局用户,不能挂长途;C类——只允许内部通话。系统硬件由数据采集和接续控制两部分接口电路组成,通过一片总线缓冲器与TP801的数据总线相联接。数据采集接口,完成小交换机开关量数据到单板机能识别的数字量数据的转换,接续控制接口,实现上述过程的逆过程。单板机循环查询小交换机数据,跟踪记录有关机健动作。根据交换机的动作时序,正确解释其动作含意,并根据用户数据实时作出接续裁决。所采集的信号主要有:标志器中的呼出标志、主叫号码,记发器的占用状态及记发器坐 We use the TP801 single-board machine to achieve cross-small switch user classification management. Users are divided into three categories: Class A - the right to call an outside line (dialing an exchange office), allowing long-distance connections; a Class B - allowing calls to the local office users not to hang long distances; Class C - only internal calls are allowed. The system hardware is composed of two parts interface circuit of data acquisition and connection control, which is connected with the data bus of TP801 through a bus buffer. Data acquisition interface to complete the digital switchboard switchboard data to identify the function of the digital data conversion, the control interface, the reverse process to achieve the above process. Slot machine cycle check the data of the small exchange, tracking records about the machine Jian action. According to the action sequence switch, the correct interpretation of the meaning of its action, and in accordance with user data to make a succession decision in real time. The collected signals are: the logo of the outgoing signs, caller ID, the memory of the state register and register