公开(公告)号：WO1995015630A1

公开(公告)日：1995-06-08

申请号：PCT/US1994012855

申请日：1994-11-08

Applicant: INTEGRATED NETWORK CORPORATION

Inventor： INTEGRATED NETWORK CORPORATION ,  EMERSON, Earl, A. ,  GONZALES, Henry, J. ,  HONG, Kyung-Yeop

IPC: H04L01/24

CPC classification number: H04L1/247 ,  G06F11/1402 ,  G06F11/22 ,  G06F13/38 ,  H04B17/401 ,  H04L1/241 ,  H04L1/243 ,  H04L1/244 ,  H04L43/50

Abstract: A system for isolating the direction of communication errors in the local loop of a digital data network is described. A Network Interface Unit (NIU) located at the customer premises typically has a loopback feature, allowing for Bit Error Rate Tests (BERT) to be performed on the local loop from a remote test system located on the data network. The NIU loopback test isolates transmission problems at the customer premises from problems on the local loop. The present invention adds test pattern generation capability to the NIU, allowing the remote test system to determine whether the transmission problem on the local loop is in the network to customer premises direction or in the customer premises to network direction.

Abstract translation: 描述了用于隔离数字数据网络的本地环路中的通信错误的方向的系统。 位于客户驻地的网络接口单元（NIU）通常具有环回功能，允许在位于数据网络上的远程测试系统的本地环路上执行误码率测试（BERT）。 NIU环回测试将客户端的传输问题与本地环路上的问题隔离开来。 本发明向NIU添加测试模式生成能力，允许远程测试系统确定本地环路上的传输问题是否在网络中到客户驻地方向或者在客户驻地到网络方向。