Patents Assigned to U.S. Robotics Corporation
  • Patent number: 7050523
    Abstract: Systems and methods are provided for performing the required phase calculation in a telecommunications system in order to optimize system performance more quickly and with reduced complexity as compared to prior approaches to solving this problem. In accordance with the preferred exemplary embodiment of the present invention, the phase delay of the precursor EQ is utilized for estimating the entire DFE phase shift by calculating the estimation exclusively based on an output of the precursor EQ this estimation is then used for adjusting the timing phase based on the phase estimation.
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: May 23, 2006
    Assignee: U.S. Robotics Corporation
    Inventors: Qing Chen, Qian Cheng
  • Patent number: 5796742
    Abstract: A bi-directional wire-line to local area network interface, used between a remote host on a local area network (LAN), and a wire-line carrier system. A LAN media access control and physical interface converts outgoing LAN data from a LAN to an outgoing-data packet with a machine readable format. A LAN transmission control protocol and internet protocol stack identifies a protocol type of the outgoing-data packet from the LAN-MAC and physical interface. When the outgoing-data packet does not have a modem control command, a protocol converter correlates the outgoing-data packet to a channel number and depacketizes the outgoing-data packet into outgoing-binary data. Using the channel number, a connection controller and signal transform polls the outgoing-binary data and transforms the outgoing-binary data to a digitized representation of an analog signal having pulse code modulation (PCM).
    Type: Grant
    Filed: January 14, 1997
    Date of Patent: August 18, 1998
    Assignee: U.S. Robotics Corporation
    Inventors: David Klotzbach, Mark Pecen, Keith Favreau, Michael Knueven
  • Patent number: 5717690
    Abstract: A method for coordinating and controlling multiple data streams representing a data transmission session that terminate in different termination units (such as network access servers). The data streams are transmitted over two or more links, collectively forming a "bundle". The termination units are linked together preferably over a local area network. One of the termination units that receives a data stream is designated as the termination unit to receive and reconstruct the call. The designated termination unit is the "owner" of the bundle. The termination unit broadcasts an advertisement consisting of a bundle mapping update packet software structure with an identification header to alert the other termination units that it is to reconstruct the call. The identification header in the advertisement notifies the other termination units that if they should receive a portion of the data stream in the bundle, they should forward their packets of data to the designated termination unit.
    Type: Grant
    Filed: November 17, 1995
    Date of Patent: February 10, 1998
    Assignee: U.S. Robotics Corporation
    Inventors: Kenneth L. Peirce, Jr., Daniel L. Schoo, Matthew H. Harper