Patents by Inventor Tze-jian Liu

Tze-jian Liu 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).

  • Patent number: 6278705
    Abstract: The present invention provides a modular architecture for connecting a plurality of telephone lines to a computer network. The invention binds a plurality of network access servers together so that they form a single system image to clients dialing into the plurality of network access servers. The invention operates by providing a tunneling mechanism for communication between the network access servers. The tunneling mechanism facilitates packet re-forwarding so that a call dialed into a physical port in a network access server can be re-forwarded through a logical port in another network access server. This allows a call to be routed through a physical port in a network access server even if no logical port is available in the network access server. Packet re-forwarding also allows multilink connections through physical ports in multiple network access servers to be routed through a single logical port in a network access server.
    Type: Grant
    Filed: April 8, 1997
    Date of Patent: August 21, 2001
    Assignee: 3Com Corporation
    Inventors: Wing Cheong Chau, Darren Leu, Tze-jian Liu, Chandy Nilakantan, Jeffrey Kaiping Pao, Tsyr-Shya Joe Sun, Wayming Daniel Tai, Xiaohu Wang
  • Patent number: 6256305
    Abstract: The present invention provides a modular architecture for connecting a plurality of telephone lines to a computer network. The invention binds a plurality of network access servers together so that they form a single system image to clients dialing into the plurality of network access servers. The invention operates by providing a tunneling mechanism for communication between the network access servers. The tunneling mechanism facilitates packet re-forwarding so that a call dialed into a physical port in a network access server can be re-forwarded through a logical port in another network access server. This allows a call to be routed through a physical port in a network access server even if no logical port is available in the network access server. Packet re-forwarding also allows multilink connections through physical ports in multiple network access servers to be routed through a single logical port in a network access server.
    Type: Grant
    Filed: June 8, 1999
    Date of Patent: July 3, 2001
    Assignee: 3Com Corporation
    Inventors: Wing Cheong Chau, Darren Leu, Tze-jian Liu, Chandy Nilakantan, Jeffrey Kaiping Pao, Tsyr-Shya Joe Sun, Wayming Daniel Tai, Xiaohu Wang
  • Patent number: 6233232
    Abstract: The present invention provides a modular architecture for connecting a plurality of telephone lines to a computer network. The invention binds a plurality of network access servers together so that they form a single system image to clients dialing into the plurality of network access servers. The invention operates by providing a tunneling mechanism for communication between the network access servers. The tunneling mechanism facilitates packet re-forwarding so that a call dialed into a physical port in a network access server can be re-forwarded through a logical port in another network access server. This allows a call to be routed through a physical port in a network access server even if no logical port is available in the network access server. Packet re-forwarding also allows multilink connections through physical ports in multiple network access servers to be routed through a single logical port in a network access server.
    Type: Grant
    Filed: April 8, 1997
    Date of Patent: May 15, 2001
    Assignee: 3Com Corporation
    Inventors: Wing Cheong Chau, Darren Leu, Tze-jian Liu, Chandy Nilakantan, Jeffrey Kaiping Pao, Tsyr-Shya Joe Sun, Wayming Daniel Tai, Xiaohu Wang
  • Patent number: 6147987
    Abstract: The present invention provides a modular architecture for connecting a plurality of telephone lines to a computer network. The invention binds a plurality of network access servers together so that they form a single system image to clients dialing into the plurality of network access servers. The invention operates by providing a tunneling mechanism for communication between the network access servers. The tunneling mechanism facilitates packet re-forwarding so that a call dialed into a physical port in a network access server can be re-forwarded through a logical port in another network access server. This allows a call to be routed through a physical port in a network access server even if no logical port is available in the network access server. Packet re-forwarding also allows multilink connections through physical ports in multiple network access servers to be routed through a single logical port in a network access server.
    Type: Grant
    Filed: April 8, 1997
    Date of Patent: November 14, 2000
    Assignee: 3Com Corporation
    Inventors: Wing Cheong Chau, Darren Leu, Tze-jian Liu, Chandy Nilakantan, Jeffrey Kaiping Pao, Tsyr-Shya Joe Sun, Wayming Daniel Tai, Xiaohu Wang
  • Patent number: 6026085
    Abstract: The present invention provides a modular architecture for connecting a plurality of telephone lines to a computer network. The invention binds a plurality of network access servers together so that they form a single system image to clients dialing into the plurality of network access servers. The invention operates by providing a tunneling mechanism for communication between the network access servers. The tunneling mechanism facilitates packet re-forwarding so that a call dialed into a physical port in a network access server can be re-forwarded through a logical port in another network access server. This allows a call to be routed through a physical port in a network access server even if no logical port is available in the network access server. Packet re-forwarding also allows multilink connections through physical ports in multiple network access servers to be routed through a single logical port in a network access server.
    Type: Grant
    Filed: April 8, 1997
    Date of Patent: February 15, 2000
    Assignee: 3Com Corporation
    Inventors: Wing Cheong Chau, Darren Leu, Tze-jian Liu, Chandy Nilakantan, Jeffrey Kaiping Pao, Tsyr-Shya Joe Sun, Wayming Daniel Tai, Xiaohu Wang
  • Patent number: 6011910
    Abstract: The present invention provides a modular architecture for connecting a plurality of telephone lines to a computer network. The invention binds a plurality of network access servers together so that they form a single system image to clients dialing into the plurality of network access servers. The invention operates by providing a tunneling mechanism for communication between the network access servers. The tunneling mechanism facilitates packet re-forwarding so that a call dialed into a physical port in a network access server can be re-forwarded through a logical port in another network access server. This allows a call to be routed through a physical port in a network access server even if no logical port is available in the network access server. Packet re-forwarding also allows multilink connections through physical ports in multiple network access servers to be routed through a single logical port in a network access server.
    Type: Grant
    Filed: April 8, 1997
    Date of Patent: January 4, 2000
    Assignee: 3Com Corporation
    Inventors: Wing Cheong Chau, Darren Leu, Tze-jian Liu, Chandy Nilakantan, Jeffrey Kaiping Pao, Tsyr-Shya Joe Sun, Wayming Daniel Tai, Xiaohu Wang