利用微机工作站对用户程控交换机电话通信进行自动计费和监视，同时使交换机开通用户分机直拨电话，方便了用户，并加强了收费管理。其中软件设计采用的数据库与汇编语言的接口技术和中断技术，有效地解决了具有实时性的网络ＭＩＳ系统的技术难点。 The use of computer workstations on the user program-controlled switch telephone communication automatic billing and monitoring, while enabling the exchange of users dial direct extension users, to facilitate the user and to strengthen the management fees. Among them the software design uses the database and the assembly language interface technology and the interrupt technology, has effectively solved the real-time network MIS system technical difficulty.