目前,市场上销售的电话自动计费器大部分都没有通信、集中管理、自动拨号等功能。为此,我们设计了公用电话自动计费器集中管理系统。 (1)管理中心 是集中管理系统的主控单元,负责对各公话代办点计费器进行统一管理。主要由线路分配器、下位机、多串口卡、上位机组成。线路分配器实质上是具有自动排队功能的程控交换系统,它均匀地进行线路分配。下位机主要由8051CPU、程序数据存储器、 At present, most of the automatic telephone feeders sold in the market do not have the functions of communication, centralized management and automatic dialing. To this end, we have designed a public telephone automatic meter centralized management system. (1) The management center is the main control unit of the centralized management system, which is responsible for the unified management of the charge counters of each public telephone. Mainly by the line distributor, the next crew, multi-serial port card, host computer. Line distributor is essentially a program-controlled switching system with automatic queuing, which distributes lines evenly. Lower computer mainly by the 8051CPU, program data memory,