ＧＭ８１００长途电话控制器此控制器除了具有同类产品的特性外，还能使管理者根据自己的意图，设置１００个密码、当密码授权人挂发长途电话时，控制器内部自动为该授权人分配一个身份码，此身份码可打印出来，使管理者对主叫的身份一目了然，该控制器在话线上任意一点与... GM8100 long-distance call controller This controller not only has the characteristics of similar products, but also enables managers to set 100 passwords according to their own intent. When the authorized person hangs the long-distance call, the controller automatically allocates the authorized person An identity code, this identity code can be printed out, so that the manager of the identity of the caller at a glance, the controller at any point on the line and ...