Patents by Inventor Andy A. Cheng

Andy A. Cheng 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).

  • Systems and methods for utilizing a spare switch in a distributed VOIP system
    Patent number: 7990953
    Abstract: A distributed VoIP system includes a network and a first switch at a first site coupled to the network. The first switch is configured to provide telephony services to a first communication device. The system also includes a second switch at a second site coupled to the network. The second switch is configured to provide telephony services to a second communication device. The system also includes a spare switch coupled to the network. The spare switch is configured to provide telephony services to the first communication device if the first communication device is unable to register with the first switch, and the spare switch is configured to provide telephony services to the second communication device if the second communication device is unable to register with the second switch.
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: August 2, 2011
    Assignee: Shoretel, Inc.
    Inventors: Andy A. Cheng, Glen K. Okita, Robert R. Burns
  • SYSTEMS AND METHODS FOR UTILIZING A SPARE SWITCH IN A DISTRIBUTED VOIP SYSTEM
    Publication number: 20100080213
    Abstract: A distributed VoIP system includes a network and a first switch at a first site coupled to the network. The first switch is configured to provide telephony services to a first communication device. The system also includes a second switch at a second site coupled to the network. The second switch is configured to provide telephony services to a second communication device. The system also includes a spare switch coupled to the network. The spare switch is configured to provide telephony services to the first communication device if the first communication device is unable to register with the first switch, and the spare switch is configured to provide telephony services to the second communication device if the second communication device is unable to register with the second switch.
    Type: Application
    Filed: September 30, 2008
    Publication date: April 1, 2010
    Applicant: ShoreTel, Inc.
    Inventors: Andy A. Cheng, Glen K. Okita, Robert R. Burns