Drop testing in fiber to the home systems
First Claim
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1. A digital loop transmission system comprising:
- a central office terminal;
a remote terminal optically and electrically coupled to the central office terminal;
a distant terminal optically coupled to the remote terminal; and
means in the distant terminal for testing electrical wires extending beyond the distant terminal and for optically transmitting the results of said test to the remote terminal.
1 Assignment
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Accused Products
Abstract
Disclosed is a means for testing drop wires in digital loop systems which employ optical fiber up to a distant terminal near the subscriber'"'"'s premises. A test module is provided at the distant terminal to determine the presence or absence of faults on the wires to the customer premises. The results of the test are transmitted via an optical data link to the remote terminal where the results can be accessed by a loop tester at the central office.
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Citations
20 Claims
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1. A digital loop transmission system comprising:
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a central office terminal; a remote terminal optically and electrically coupled to the central office terminal; a distant terminal optically coupled to the remote terminal; and means in the distant terminal for testing electrical wires extending beyond the distant terminal and for optically transmitting the results of said test to the remote terminal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A circuit for electrically testing a pair of wires comprising:
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circuit means for generating a constant current having at least two values; a bridge circuit having two legs and including means for comparing voltages at the two legs of the circuit; and means for coupling at least one of said wires to a leg of the bridge circuit. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification