Self-diagnosis of loop start and ground start trunk interfaces

Details Self-diagnosis of loop start and ground start trunk interfaces Self-diagnosis of loop start and ground start trunk interfaces

1990-04-12

1991-03-26

Schreyer, Stafford D.

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Testing of subscriber loop or terminal

379 1234, H04M 124

Patent

active

050035738

ABSTRACT:
Method and apparatus for sectionalization and self-diagnosis of loop start and ground start trunk interfaces without intervention from host telephone company equipment. The inventive method entails the use of an isolation relay in the trunk circuit to isolate the trunk circuit electrically from the physical medium and to apply various signals to portions of the isolated trunk circuit to carry out specific self-diagnostic tests.

REFERENCES:
patent: 4796290 (1989-01-01), Perry

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