Patents by Inventor Barry Bielsker

Barry Bielsker 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).

  • Automatic echo cancellation for an integrated services digital network interface
    Patent number: 6430162
    Abstract: An echo canceler is connected to an ISDN Primary Rate Interface. The echo canceler is provided with an activation processor for monitoring call control messages on the D-channel and for selectively enabling or disabling echo cancellation on any of the B-channels in response to information contained within the call control messages. In particular, the activation processor decides whether to enable cancellation depending upon the Information Transfer Capability and Protocol Identification fields of the Bearer Capability portion of a call SETUP message. Additionally, the Channel Identification field of the SETUP message is used to identify the B-channel or channels affected by the SETUP message. When a channel is released, the activation processor maintains enabled echo cancellation as the default condition of the released channel. Other signal processing functions can be controlled by the activation processor in a similar manner.
    Type: Grant
    Filed: June 24, 1999
    Date of Patent: August 6, 2002
    Assignee: Tellabs Operations, Inc.
    Inventors: Charles A. Reese, Barry Bielsker
  • Automatic echo cancellation for an integrated services digital network interface
    Patent number: 6134224
    Abstract: An echo canceler is connected to an ISDN Primary Rate Interface. The echo canceler is provided with an activation processor for monitoring call control messages on the D-channel and for selectively enabling or disabling echo cancellation on any of the B-channels in response to information contained within the call control messages. In particular, the activation processor decides whether to enable cancellation depending upon the Information Transfer Capability and Protocol Identification fields of the Bearer Capability portion of a call SETUP message. Additionally, the Channel Identification field of the SETUP message is used to identify the B-channel or channels affected by the SETUP message. When a channel is released, the activation processor maintains enabled echo cancellation as the default condition of the released channel. Other signal processing functions can be controlled by the activation processor in a similar manner.
    Type: Grant
    Filed: April 22, 1997
    Date of Patent: October 17, 2000
    Assignee: Tellabs Operations, Inc.
    Inventors: Charles Reese, Barry Bielsker
  • Automatic echo cancellation for an integrated services digital network interface
    Patent number: 5631958
    Abstract: An echo canceler is connected to an ISDN Primary Rate Interface. The echo canceler is provided with an activation processor for monitoring call control messages on the D-channel and for selectively enabling or disabling echo cancellation on any of the B-channels in response to information contained within the call control messages. In particular, the activation processor decides whether to enable cancellation depending upon the Information Transfer Capability and Protocol Identification fields of the Bearer Capability portion of a call SETUP message. Additionally, the Channel Identification field of the SETUP message is used to identify the B-channel or channels affected by the SETUP message. When a channel is released, the activation processor maintains enabled echo cancellation as the default condition of the released channel. Other signal processing functions can be controlled by the activation processor in a similar manner.
    Type: Grant
    Filed: October 4, 1994
    Date of Patent: May 20, 1997
    Assignee: Coherent Communications Systems Corp.
    Inventors: Charles Reese, Barry Bielsker