ISDN disconnect alarm generation tool for use in voice over...

Details ISDN disconnect alarm generation tool for use in voice over... ISDN disconnect alarm generation tool for use in voice over...

2006-05-23

2006-05-23

Pwu, Jeffrey (Department: 2143)

Electrical computers and digital processing systems: multicomput

Computer network managing

Computer network monitoring

C714S047300, C714S048000

Reexamination Certificate

active

07051099

ABSTRACT:
An alarm generation tool that operates within a Voice over IP (VoIP) network environment to generate alarms based on ISDN disconnect cause codes. The tool examines call-specific usage records associated with VoIP traffic to detect ISDN disconnect cause codes and determines failure rate information from failure-type disconnect cause codes among the ISDN disconnect cause codes on a per-gateway basis. The tool generates alarms when the failure rate information, such as failure rates and/or counts, exceeds defined thresholds.

REFERENCES:
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patent: 6282192 (2001-08-01), Murphy et al.
patent: 6553515 (2003-04-01), Gross et al.
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Encyclopedia, Q.931 Protocol Overview, http://www.freesoft.org, pp. 1-7.

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