Patents by Inventor Dominic Walker

Dominic Walker 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).

  • Voice and fax over IP call establishment in a communications network
    Patent number: 7907708
    Abstract: In a communications network, voice and facsimile calls are established between first and second and second terminals via first and second media gateways in a communications network. Each gateway is capable of autonomous transitioning between a voice over IP (VoIP) call mode and a facsimile over IP (FoIP) call mode. A bearer path for the call is established via a media gateway controller. During call setup, the media gateways exchange confirmation of each gateway's capability to perform autonomous transitioning between VoIP and FoIP call modes. The call is established as a VoIP call, and, on a determination by the media gateways that a facsimile call is required, each media gateway autonomously transitions between its VoIP and FoIP call modes without the intervention of the media gateway controller.
    Type: Grant
    Filed: June 6, 2002
    Date of Patent: March 15, 2011
    Assignee: Genband US LLC
    Inventors: Dominic Walker, Graeme Gibbs
  • Tandem free operation over packet networks
    Patent number: 7876745
    Abstract: A packet-based network carries a stream of voice band data, such as PCM voice data, which can include tandem free operation (TFO) information. Voice data is usually subject to processing, such as compression, at an ingress entity. The ingress entity determines whether the stream of voice data contain tandem free operation (TFO) information and, if TFO information is present, sends the TFO information across the packet network without subjecting it to processing. This preserves the integrity of the TFO information. TFO information can be carried by an unprocessed channel having a bandwidth of less than 64 kbit/s. TFO information is reinserted at an egress entity of the packet network.
    Type: Grant
    Filed: October 23, 2003
    Date of Patent: January 25, 2011
    Assignee: Nortel Networks Limited
    Inventors: Mark Stewart, Graeme Gibbs, Dominic Walker
  • Voice and fax over IP call establishment in a communications network
    Publication number: 20030193696
    Abstract: In a communications network, voice and facsimile calls are established between first and second and second terminals via first and second media gateways in a communications network. Each gateway is capable of autonomous transitioning between a voice over IP (VoIP) call mpde and a facsimile ov er IP (FoIP) call mode. A bearer path for the call is established via a media gateway controller. During call setup, the media gateways exchange confirmation of each gateway's capability to perform autonomous transitioning between VoIP and FoIP call modes. The call is established as a VoIP call, and, on a determination by the media gateways that a facsimile call is required, each media gateway autonomously transitions between its VoIP and FoIP call modes without the intervention of the media gateway controller.
    Type: Application
    Filed: June 6, 2002
    Publication date: October 16, 2003
    Inventors: Dominic Walker, Graeme Gibbs