Customer premises loop test unit powered from the normal central

Details Customer premises loop test unit powered from the normal central Customer premises loop test unit powered from the normal central

1982-04-23

1984-05-01

Schreyer, Stafford D.

179 2A, H04B 346

Patent

active

044463405

ABSTRACT:
A loopback circuit for use in testing a telephone line between the central office and a subscriber's equipment. The loopback circuit is located at the subscriber's end of the line and is powered solely by the normal central office power source.

REFERENCES:
patent: 3852537 (1974-12-01), Vincent
patent: 3912882 (1975-10-01), Beerbaum

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