電話障礙作業自動化系統 整合式電話障礙申告服務系統 值機員電路集縮分配系統 語音應答服務單元 用戶迴路自動維修系統 Automatic reply for telephone information system ARTIS Integrated telephone trouble complaint service system ITCS Operator circuit concentration and distribution system OCADS Voice answer service unit VASU Subscriber-loop maintenance of automatic system SMAS