US5495470A
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Alarm correlation system for a telephone network
Assignee: Applied Digital Access Inc
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Filing: 1993-11-23
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Granted: 1996-02-27
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Expires: 2013-11-23
Abstract
Abstract A DS3 level access, monitor and test system for a telephone network. The system provides selective, and hitless, bit overwrite in any of the embedded DS1, DS0 and subrate channels in a DS3 signal. Multiple DS0 and subrate channels can be tested via the asynchronous time slot interchange in conjunction with the recombiner of the present invention. The present invention further includes a lookahead reframer for framing to the DS3 signal. The present invention also includes a facilities data link (FDL) handler for capturing the FDL channel data in every DS1 channel in a DS3 signal. A high speed bit-for-bit compare is interfaced to a protect path to provide 1:1 fault protection in the system of the present invention. Full time performance monitoring on DS1 and DS3 signals is performed by a shared resource. The system of the present invention provides an integrated approach to synchronization measurement and relative synchronization, and also provides alarm correlation and hierarchical event filtering.
Inventors
- 👤 Edward Tyburski
- 👤 Paul R. Hartmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:07
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H04Q11/0421; H04J; H04J3/00; H04J3/02; H04J3/06; H04J3/0602; H04J3/0605; H04J3/0608; H04J3/062; H04J3/0623; H04J3/14; H04M; H04M3/00; H04M3/22; H04M3/24; H04M3/244
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
135 words
A system for correlating performance monitoring and testing data of a channel having a plurality of embedded channels, comprising: means for receiving the channel, wherein each of the channel and the embedded channels have a received clock frequency and phase; first means for detecting a disturbance in the channel; second means for detecting a disturbance in one of the embedded channels; means for correlating the disturbance in the channel with the disturbance in the embedded channel; means for generating an alarm for a one of the disturbances including means for blocking the generation of an alarm of the embedded channel disturbance when the embedded channel disturbance correlates to the disturbance of the channel; and means for transmitting the channel, wherein each of the channel and the embedded channels have the received clock frequency and phase.
Claim 2
Independent Claim
135 words
A system for correlating performance monitoring and testing data of a channel having a plurality of embedded channels, comprising: means for receiving the channel, wherein each of the channel and the embedded channels have a received clock frequency and phase; first means for detecting a disturbance in the channel; second means for detecting a disturbance in one of the embedded channels; means for correlating the disturbance in the channel with the disturbance in the embedded channel; means for generating an alarm for a one of the disturbances including means for blocking the generation of an alarm of the embedded channel disturbance when the embedded channel disturbance correlates to the disturbance of the channel; and means for transmitting the channel, wherein each of the channel and the embedded channels have the received clock frequency and phase.
Claim 3
Dependent Claim
20 words
The system defined in claim 1, wherein testing of the embedded channel is interrupted when testing of the channel fails.
Claim 4
Dependent Claim
27 words
The system defined in claim 1, additionally comprising means for filtering each disturbance received from the second detection means, wherein the correlation means is provided filtered disturbances.
Claim 5
Dependent Claim
19 words
The system defined in claim 1, wherein each of the first and second detection means includes an event sampler.
Claim 6
Dependent Claim
19 words
The system defined in claim 1, wherein each of the first and second detection means includes an event flag.
Claim 7
Dependent Claim
14 words
The system defined in claim 1, additionally comprising means for storing performance monitoring data.
Claim 8
Dependent Claim
19 words
The system defined in claim 6, additionally comprising means for reporting performance monitoring data received from the storage means.
Claim 9
Independent Claim
152 words
A system for correlating performance monitoring and testing data of a channel having a plurality of embedded channels, comprising: a receiver capable of receiving the channel, wherein each of the channel and the embedded channels have a received clock frequency and phase; a first sampler capable of detecting a disturbance in the channel; a second sampler capable of detecting a disturbance in one of the embedded channels; an alarm correlator capable of correlating the disturbance in the channel with the disturbance in the embedded channel; an alarm generator capable of generating an alarm for a one of the disturbances including an alarm blocking function for preventing the generation of an alarm of the embedded channel disturbance when the embedded channel disturbance correlates to the disturbance of the channel; and a transmitter capable of transmitting the channel, wherein each of the channel and the embedded channels have the received clock frequency and phase.
Claim 10
Independent Claim
152 words
A system for correlating performance monitoring and testing data of a channel having a plurality of embedded channels, comprising: a receiver capable of receiving the channel, wherein each of the channel and the embedded channels have a received clock frequency and phase; a first sampler capable of detecting a disturbance in the channel; a second sampler capable of detecting a disturbance in one of the embedded channels; an alarm correlator capable of correlating the disturbance in the channel with the disturbance in the embedded channel; an alarm generator capable of generating an alarm for a one of the disturbances including an alarm blocking function for preventing the generation of an alarm of the embedded channel disturbance when the embedded channel disturbance correlates to the disturbance of the channel; and a transmitter capable of transmitting the channel, wherein each of the channel and the embedded channels have the received clock frequency and phase.
Claim 11
Dependent Claim
15 words
The system defined in claim 8, wherein the alarm correlator includes a hierarchy of alarms.
Claim 12
Dependent Claim
15 words
The system defined in claim 9, wherein the hierarchy specifies a defined order of precedence.
Claim 13
Dependent Claim
18 words
The system defined in claim 8, wherein the alarm correlator includes a defect timer associated with each channel.
Claim 14
Dependent Claim
21 words
The system defined in claim 8, wherein the alarm correlator comprises a per channel scan sequence executed at predetermined time intervals.
Claim 15
Dependent Claim
30 words
The system defined in claim 12, wherein each per channel scan sequence comprises a plurality of per alarm sequences, wherein each per alarm sequence is indicative of an alarm condition.
Claim 16
Dependent Claim
18 words
The system defined in claim 8, wherein each of the first and second samplers includes an event sampler.
Claim 17
Dependent Claim
18 words
The system defined in claim 8, wherein each of the first and second samplers includes an event flag.
Claim 18
Dependent Claim
28 words
The system defined in claim 15, wherein each embedded channel event flag utilizes a delay to enable the second sampler to acknowledge the occurrence of a channel disturbance.
Claim 19
Dependent Claim
28 words
The system defined in claim 8, additionally comprising a filter capable of filtering each disturbance received from the second sampler, wherein the alarm correlator is provided filtered disturbances.
Claim 20
Dependent Claim
20 words
The system defined in claim 8, wherein testing of the embedded channel is interrupted when testing of the channel fails.
Claim 21
Dependent Claim
17 words
The system defined in claim 8, additionally comprising a memory configured to store the performance monitoring data.
Claim 22
Dependent Claim
24 words
The system defined in claim 19, wherein the memory comprises an elastic buffer capable of storing at least four seconds of performance monitoring data.
Claim 23
Dependent Claim
22 words
The system defined in claim 19, additionally comprising a performance monitoring statistics process to report performance monitoring data received from the memory.
Claim 24
Independent Claim
127 words
A method of correlating performance monitoring and testing data of a channel having a plurality of embedded channels, the method comprising the steps of: receiving the channel, wherein each of the channel and the embedded channels have a received clock frequency and phase; detecting a disturbance in the channel; detecting a disturbance in one of the embedded channels; correlating the disturbance in the channel with the disturbance in the embedded channel; generating an alarm for a one of the disturbances including the step of blocking the generation of an alarm of the embedded channel disturbance when the embedded channel disturbance correlates to the disturbance of the channel; and transmitting the channel, Wherein each of the channel and the embedded channels have the received clock frequency and phase.
Claim 25
Independent Claim
127 words
A method of correlating performance monitoring and testing data of a channel having a plurality of embedded channels, the method comprising the steps of: receiving the channel, wherein each of the channel and the embedded channels have a received clock frequency and phase; detecting a disturbance in the channel; detecting a disturbance in one of the embedded channels; correlating the disturbance in the channel with the disturbance in the embedded channel; generating an alarm for a one of the disturbances including the step of blocking the generation of an alarm of the embedded channel disturbance when the embedded channel disturbance correlates to the disturbance of the channel; and transmitting the channel, Wherein each of the channel and the embedded channels have the received clock frequency and phase.
Claim 26
Dependent Claim
20 words
The method defined in claim 22, additionally comprising the step of testing the disturbed channel and the disturbed embedded channel.
Claim 27
Dependent Claim
23 words
The method defined in claim 23, wherein testing of the embedded channel is interrupted when testing of the channel indicates a hard failure.
Claim 28
Dependent Claim
31 words
The method defined in claim 22, additionally comprising the steps of: filtering each disturbance detected by the embedded channels detecting step; and providing only the filtered disturbances to the correlating step.
Claim 29
Dependent Claim
39 words
The method defined in claim 22, wherein the steps of detecting a disturbance in the channel and detecting a disturbance in one of the embedded channels include the step of sampling a register associated with each of said channels.
Claim 30
Dependent Claim
27 words
The method defined in claim 26, wherein the sampling step includes the step of setting an event flag based upon one or more bits in the register.
Claim 31
Dependent Claim
16 words
The method defined in claim 22, additionally comprising the step of storing the performance monitoring data.
Claim 32
Dependent Claim
17 words
The method defined in claim 28, additionally comprising the step of reporting the stored performance monitoring data.
Claim 33
Dependent Claim
22 words
The method defined in claim 22, wherein the step of correlating includes the step of scanning each channel at predetermined time intervals.
Claim 34
Dependent Claim
20 words
The method defined in claim 30, wherein the step of scanning each channel comprises a plurality of per alarm sequences.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-02-26 | 1999-08-28 | 2000-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-02-26 | 2003-08-28 | 2004-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-02-26 | 2007-08-28 | 2008-02-27 | $7700.00 | Window Closed / Lapsed |