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针对ＪＳＱ－３１型程控交换机介绍一种全自动话费管理系统，对系统设计、工作原理、通信规程及软件设计作了说明。
Aiming at JSQ-31 program-controlled switchboard, a kind of automatic call management system is introduced. The system design, working principle, communication rules and software design are described.