电话单路计费系统!LCD段码显示!电话机设定自由费率,根据反极信号计费及延时计费自由设定!-one-way telephone billing system. LCD display of code! Set free telephone rates Under the anti-billing and very signal delay billing set free!

摘要:　利用PC机与MCS-51单片机,设计并实现了直线电话计费系统。该系统可以实现电话话单的记录、话费 的统计与结算、用户话机权限控制、密码电话等功能。 关　键　词:　程控交换机 电话计费 单片机 数据采集 -Abstract: The use of PC computer and MCS-51 microcontroller, designed and implemented line telephone billing system. The system can call i