公开(公告)号：WO1994013090A1

公开(公告)日：1994-06-09

申请号：PCT/CA1993000310

申请日：1993-07-30

Applicant: ATLAS TELECOM INTERNATIONAL LTD.

Inventor： ATLAS TELECOM INTERNATIONAL LTD. ,  CHARLAND, Claude

IPC: H04M03/30

CPC classification number: H04M19/08 ,  H04M3/30 ,  H04M3/301 ,  H04M3/323 ,  H04M2201/16

Abstract: A network termination unit (20) for connection to a telephone line (12, 14) at a predetermined demarcation point thereof for sequentially simulating a plurality of fault conditions to allow a diagnostic routine to be performed on the telephone line at a remote location from the demarcation point. The network termination unit (20) comprises a plurality of semiconductor switches (34, 36, 38, 40, 42, 43) electrically connected to conductors of the telephone line to establish a network of electrical paths capable of altering the electrical condition of the telephone line when caused to assume a state of conduction. A logic module (32) causes the switches to assume either a closed or an opened condition in accordance with a predetermined sequence established by a hard-wired program.

Abstract translation: 一种用于在其预定分界点处连接到电话线路（12,14）的网络终端单元（20），用于顺序地模拟多个故障状况，以允许在远离所述电话线路的电话线上执行诊断程序 分界点 网络终端单元（20）包括电连接到电话线的导体的多个半导体开关（34,36,38,40,42,43），以建立能够改变电话的电气状况的电路径网络 当导致线路呈现导通状态时。 逻辑模块（32）使得开关根据由硬连接程序建立的预定顺序来呈现关闭状态或打开状态。