Circuit for testing digital lines

Details Circuit for testing digital lines Circuit for testing digital lines

1990-11-19

1993-05-04

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370017, 371 201, 379 29, H04J 0116, H04J 0314

Patent

active

052088030

ABSTRACT:
A digital test card for testing the quality of a digital system in a central office system is disclosed. Where the digital system consists of a digital line card connected to a customer premise equipment by a two-wire connection. The digital test card comprises a line interface which provides a full duplex transmission link. When the digital test card is testing the customer premises equipment the line interface operates as a master; when testing the digital line card the line interface operates as a slave. There is also a relay for connecting the line interface to the customer premise equipment or the digital line card. Connected between the line interface and the central office system is a buffer. A protocol controller connected to the line interface performs a packet protocol. And finally there is a processor. Under the direction of the central office system, the processor controls the operation of the digital line card and determines the quality of the digital system.

REFERENCES:
patent: 4551585 (1985-11-01), Daniels et al.
patent: 4606019 (1986-08-01), Takai
patent: 4611320 (1986-09-01), Southard
patent: 4730313 (1988-03-01), Stephenson et al.
patent: 4841520 (1989-06-01), Steely
patent: 4878048 (1989-10-01), Gottesman et al.
patent: 4894824 (1990-01-01), Hemmady et al.
patent: 4965795 (1990-10-01), Coffelt et al.
patent: 4996695 (1991-02-01), Dack et al.
patent: 4998240 (1991-03-01), Williams
patent: 5027343 (1991-06-01), Chen et al.

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