Patents by Inventor Fred R. Ziegler

Fred R. Ziegler has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • ISDN disconnect alarm generation tool for use in voice over IP (VoIP) networks
    Patent number: 8375121
    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.
    Type: Grant
    Filed: May 22, 2006
    Date of Patent: February 12, 2013
    Assignee: Level 3 Communications, LLC
    Inventors: Fred R. Ziegler, Sol Farber
  • ISDN disconnect alarm generation tool for use in voice over IP (VoIP) networks
    Patent number: 7051099
    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.
    Type: Grant
    Filed: May 31, 2001
    Date of Patent: May 23, 2006
    Assignee: Level 3 Communications, Inc.
    Inventors: Fred R. Ziegler, Sol Farber
  • ISDN disconnect alarm generation tool for use in voice over IP (VoIP) networks
    Publication number: 20030023714
    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.
    Type: Application
    Filed: May 31, 2001
    Publication date: January 30, 2003
    Inventors: Fred R. Ziegler, Sol Farber