Performance monitoring system
First Claim
1. A performance monitoring system (PMS) for in-service monitoring of digital carrier facilities of the type having a chain of facilities serially linked together, each facility having at least one component which processes a digital signal from an upstream facility and which has bit-error detection circuitry for producing a logic level output in response to detection of an error in said digital signal, and an alarm control unit including relay contacts closeable in response to detection of a predetermined rate of errors detected by said circuitry, said system comprising:
- a) logic means associated with each component in a facility and responsive to logic level outputs of the bit-error detection circuitry with which the logic means is associated for storing a representation of the number of errored-seconds detected thereby;
b) a control center for in-service monitoring of the performance of the components in the facilities; and
c) connection means for selectively connecting said logic means to said control center.
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Accused Products
Abstract
A performance monitoring system is provided for in-service monitoring of digital carrier facilities of the type having a chain of facilities serially linked together. Each facility has at least one component which processes a digital signal received from an upstream facility, and which has bit error detection circuitry for producing a logic level output in response to detection of an error in the digital signal. A logic circuit is associated with each component in a facility and is responsive to the logic level output of the bit error detection circuitry with which the logic circuit is associated for storing a representation of the number of errors detected thereby. A control center is provided for in-service monitoring of the performance of the components in the facilities. A connection circuit is provided for selectively connecting the logic means to the control center.
32 Citations
35 Claims
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1. A performance monitoring system (PMS) for in-service monitoring of digital carrier facilities of the type having a chain of facilities serially linked together, each facility having at least one component which processes a digital signal from an upstream facility and which has bit-error detection circuitry for producing a logic level output in response to detection of an error in said digital signal, and an alarm control unit including relay contacts closeable in response to detection of a predetermined rate of errors detected by said circuitry, said system comprising:
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a) logic means associated with each component in a facility and responsive to logic level outputs of the bit-error detection circuitry with which the logic means is associated for storing a representation of the number of errored-seconds detected thereby; b) a control center for in-service monitoring of the performance of the components in the facilities; and c) connection means for selectively connecting said logic means to said control center. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for monitoring the performance of a digital carrier facility of the type having a component for processing digital signal received from another facility, said component having bit error detection circuitry for producing a logic level output in response to detection of an error in said digital signal, said method comprising the steps of:
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a) beginning timing of a predetermined time interval; b) incrementing a counter each time said bit error detection circuitry produces a logic level output during said predetermined time interval; c) transferring the contents of said counter to a scratch memory, and clearing said counter at the end of said predetermined time interval; and d) repeating steps a)-c). - View Dependent Claims (21)
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22. A performance monitoring system having a control center for in-service monitoring of a remote digital carrier facility that processes digital signals, said system comprising:
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a) means for detecting bit errors in the processing by said facility of said digital signals; b) logic means responsive to detection of said bit errors for storing an indication of the number of errored-seconds in the operation of the facility; and c) means at said control center for interrogating the stored indication of the number of errored-seconds in the operation of said facility. - View Dependent Claims (23, 24, 25, 26)
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27. Apparatus for computing the number of errored-seconds during in-service operations of a digital carrier facility that processes digital signals, said apparatus comprising:
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a) means for detecting bit errors in said digital signals; b) logic means responsive to detection of said bit errors for recording the number of errored-seconds in a predetermined interval of time.
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28. Apparatus for computing errored-seconds during in-service operation of a digital carrier facility that processes digital signals, said apparatus comprising:
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a) means for detecting bit errors in said digital signals; and b) logic means responsive to detection of said bit errors for producing an indication of the number of errored-seconds in a predetermined interval of time; c) wherein said logic means is constructed and arranged to compute and store the number of errored-seconds in said predetermined interval of time. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35)
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Specification