程控数字交换机计费系统电路设计

程控数字交换机计费系统电路设计 DESIGN OF CIRCUIT FOR A PROGRAM-CONTROLLED DIGITAL EXCHANGE FEE-COUNTER SYSTEM 秦岭松 Qing Lingsong 1 2 first-author 王敬芳 Wang Jinfang 1 2 郭红星 Guo Hongxing 1 2 屠忠遂 Tu Zhongsui 1 2 武汉大学电子信息学学院,武汉 武汉大学电子信息学学院,武汉 COllege of Electronic information,Wuhan University COllege of Electronic information,Wuhan University ,430072 ,430072 针对实际的程控数字交换机计费系统，设计了一种在计算机和程控数字交换机之间进行并行通信的接口电路．该接口电路由大规模集成电路器件构成．对其硬件电路组成及工作原理作了较为详细的阐述，对计算机数据接收程序的设计也作了必要的说明，并给出了程序流图． An inferface circuit performing parallel communication between a computer and a program--controlled digital exchange for a practical fee--counter system is discribed in this paper. The inferface circuit consistsof large-scale integrated circuit components. The operation principles of the hardware is discussed in detail andthe design of the data receiving program is also discribed. 程控数字交换机 计费 并行通信 program-controlled digital exchange fee-counter parallel communication TN916.4 国家自然科学基金(61672102) 1998-05-01 2021-04-01 5