Remote module for a communications network
First Claim
1. A method, comprising:
- receiving at a network interface a first framed digital signal from customer premises equipment;
determining whether the first framed digital signal indicates a failure;
modifying overhead bits in a second framed digital signal, such that the modification is equivalent to insertion of errors into the first framed digital signal at a bit error ratio (BER) of not greater than a predetermined ratio, if the first framed digital signal indicates a failure;
selectively transmitting from the network interface the first framed digital signal, if no failure was indicated, or the second framed digital signal in place of the first framed digital signal if a failure was indicated, to indicate that the failure reported by the first framed digital signal is located in the customer premises equipment.
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Accused Products
Abstract
Determination of the location of an error condition or a failure includes receiving at a network interface a first framed digital signal from customer premises equipment, and determining whether the first framed digital signal indicates a failure. Overhead bits are modified in the first framed digital signal to generate a second framed digital signal, such that the modification is equivalent to insertion of errors into the first framed digital signal at a bit error ratio (BER) of not greater than a predetermined ratio, if the first framed digital signal indicates a failure. The second framed digital signal is then sent from the network interface in place of the first framed digital signal to indicate that the failure reported by the first framed digital signal is located in the customer premises equipment. Otherwise, if no failure is indicated, the first framed digital signal is transmitted without any modifications.
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Citations
22 Claims
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1. A method, comprising:
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receiving at a network interface a first framed digital signal from customer premises equipment;
determining whether the first framed digital signal indicates a failure;
modifying overhead bits in a second framed digital signal, such that the modification is equivalent to insertion of errors into the first framed digital signal at a bit error ratio (BER) of not greater than a predetermined ratio, if the first framed digital signal indicates a failure;
selectively transmitting from the network interface the first framed digital signal, if no failure was indicated, or the second framed digital signal in place of the first framed digital signal if a failure was indicated, to indicate that the failure reported by the first framed digital signal is located in the customer premises equipment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method, comprising:
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receiving at a network interface a first framed signal from a network;
determining whether the first framed signal indicates a failure;
receiving at the network interface a second framed signal from a customer premises equipment;
determining whether the second framed signal exhibits a remote alarm condition;
modifying overhead bits in the second framed signal to generate a third framed signal when the first framed signal does not indicate a failure but the second framed signal exhibits the remote alarm condition, such that the modification is equivalent to insertion of errors into the second framed signal at a bit error ratio (BER) of not greater than a predetermined ratio; and
selectively transmitting from the network interface the second framed signal if no remote alarm condition is exhibited, or the third framed signal, if remote alarm condition is exhibited, to indicate that a failure is located at customer premises equipment. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A network interface apparatus, comprising:
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a first receiver configured to receive a first framed digital signal from customer premise equipment;
a processor that determines whether the first framed digital signal indicates a failure, and to modify overhead bits in the first framed digital signal to generate a second framed digital signal, such that the modification is equivalent to insertion of errors into the first framed digital signal at a bit error ratio (BER) of not greater than a predetermined ratio, if the first framed digital signal indicates a failure; and
a multiplexer configured to selectively transmit the first framed digital signal if no failure is indicated, or the second framed digital signal, if failure is indicated, to indicate that an error condition or a failure is located in the customer premises equipment. - View Dependent Claims (19, 20)
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21. A network interface apparatus, comprising:
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a first receiver configured to receive a first framed digital signal from a network;
a second receiver configured to receive a second framed digital signal from customer premise equipment;
a processor that modifies overhead bits in the second framed digital signal to generate a third framed digital signal, such that the modification is equivalent to insertion of errors into the first framed digital signal at a bit error ratio (BER) of not greater than a predetermined, if the first framed digital signal does not indicate a failure but the second framed digital signal exhibits a remote alarm condition; and
a multiplexer that selectively transmits the third framed digital signal to indicate that an RAI condition is located at customer premises equipment if the first framed digital signal does not indicate a failure but the second framed digital signal exhibits an RAI condition, or otherwise the second framed digital signal. - View Dependent Claims (22)
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Specification