Test access system for a digital loop carrier system

Details Test access system for a digital loop carrier system Test access system for a digital loop carrier system

1989-01-23

1990-08-14

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

370 13, H04L 1226

Patent

active

049493558

ABSTRACT:
The test access system of the present invention is for use in a digital loop carrier communication system having at least first and second terminals connected by a digital transmission line. Each of the first and second terminals has a plurality of analog ports for analog signals and at least one digital port connected to the digital transmission line for digital signals. Each of the first and second terminals also has a plurality of channel units having first ports connected to the analog ports, respectively, and at least one digital interface unit having a first port connected to the channel units and a second port connected to the digital port. The test access system has a channel diagnostic unit connected via a first bus to each of the analog ports and the first ports of the channel units and connected via a second bus to the first port of the digital interface unit. A system access unit is connected via the first bus to each of the analog ports and the first ports of the channel units and is connected via the second bus to the first port of the digital interface unit. The channel diagnostic unit at least tests a signal path and the system access unit at least provides for monitoring and/or insertion of test signals on the signal path.

REFERENCES:
patent: 4561090 (1985-12-01), Turner
patent: 4712209 (1987-12-01), Kuritani et al.

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