Network interface unit remote test pattern generation

Details Network interface unit remote test pattern generation Network interface unit remote test pattern generation

1995-05-26

1996-09-03

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 15, 370 17, 379 5, 379 28, 379 29, 371 51, 371 205, H04J 314

Patent

active

055530591

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.

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