Patents by Inventor Narasimha K. Nayak

Narasimha K. Nayak 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).

  • Scalable voice over IP system providing independent call bridging for outbound calls initiated by user interface applications
    Patent number: 7729345
    Abstract: An IP telephony gateway and a user interface resource enable a subscriber to place an outgoing call according to the voice over IP (H.323) protocol to a destination party from a user interface session of an intelligent dial tone service such as voice activated dialing, and resume the user interface session upon completion of the outgoing call with the destination party. The IP telephony gateway establishes a user interface session for the subscriber with the user interface resource across a first Real Time Protocol (RTP) data stream. The user interface resource initiates a second RTP data stream to a destination party in response to reception of a prescribed command from the subscriber. Although an RTP bridge connecting the first and second RTP data streams can be maintained by the user interface resource, the user interface resource may also use the Empty Capability Set feature in the H.
    Type: Grant
    Filed: June 20, 2005
    Date of Patent: June 1, 2010
    Assignee: Cisco Technology, Inc.
    Inventors: James Alan Craig, Kelly Wycall Phillips, Narasimha K. Nayak
  • Scalable voice over IP system configured for dynamically switching codecs during a call
    Patent number: 6977911
    Abstract: An IP telephony gateway and a media server are configured for changing media streams during an existing call according to the voice over IP (H.323) protocol, where a first H.245 media channel configured for transmitting a first media stream at a corresponding first compression such as G.723 or G.729A is closed and a second H.245 media channel configured for transmitting a second media stream at a corresponding second compression such as G.711 is opened during the same H.225 call.
    Type: Grant
    Filed: July 31, 2000
    Date of Patent: December 20, 2005
    Assignee: Cisco Technology, Inc.
    Inventors: David William Geen, Narasimha K. Nayak, Tribhuvan Kambham
  • Voice over IP voice mail system configured for placing an outgoing call and returning subscriber to mailbox after call completion
    Patent number: 6954518
    Abstract: An IP telephony gateway and a voice mail resource enable a voice mail subscriber to place an outgoing call to a destination party from a voice mail session according to the voice over IP (H.323) protocol, and resume the voice mail session upon completion of the outgoing call with the destination party. The IP telephony gateway establishes a voice mail session for the voice mail subscriber with the voice mail resource across a first Real Time Protocol (RTP) data stream. The voice mail resource initiates a second RTP data stream to a destination party in response to reception of a prescribed command from the voice mail subscriber. Although an RTP bridge connecting the first and second RTP data streams can be maintained by the voice mail resource, the voice mail resource may also use the Empty Capability Set feature in the H.323 standard to cause the IP telephony gateway to close the first and second RTP data streams to the voice mail resource.
    Type: Grant
    Filed: April 7, 2004
    Date of Patent: October 11, 2005
    Assignee: Cisco Technology, Inc.
    Inventors: David William Geen, Narasimha K. Nayak
  • Scalable voice over IP system providing independent call bridging for outbound calls initiated by user interface applications
    Patent number: 6930999
    Abstract: An IP telephony gateway and a user interface resource enable a subscriber to place an outgoing call according to the voice over IP (H.323) protocol to a destination party from a user interface session of an intelligent dial tone service such as voice activated dialing, and resume the user interface session upon completion of the outgoing call with the destination party. The IP telephony gateway establishes a user interface session for the subscriber with the user interface resource across a first Real Time Protocol (RTP) data stream. The user interface resource initiates a second RTP data stream to a destination party in response to reception of a prescribed command from the subscriber. Although an RTP bridge connecting the first and second RTP data streams can be maintained by the user interface resource, the user interface resource may also use the Empty Capability Set feature in the H.
    Type: Grant
    Filed: June 30, 2000
    Date of Patent: August 16, 2005
    Assignee: Cisco Technology, Inc.
    Inventors: James Alan Craig, Kelly Wycall Phillips, Narasimha K. Nayak
  • Systems and methods for establishing communication between a first wireless terminal and a second wireless terminal differing in respect to at least one feature
    Publication number: 20040180689
    Abstract: Communication between a first wireless terminal and a second wireless terminal, where the first wireless terminal may have at least one feature that the second wireless terminal may not have, is established. In one specific example, the at least one feature may relate to a video call capability. Thus, for example, the second wireless terminal may not be capable of handling a video call. In that case, the communication between the first wireless terminal and the second wireless terminal may be downgraded to a voice communication.
    Type: Application
    Filed: November 3, 2003
    Publication date: September 16, 2004
    Applicant: LogicaCMG Wireless Networks, Inc.
    Inventor: Narasimha K. Nayak
  • Voice over IP voice mail system configured for placing an outgoing call and returning subscriber to mailbox after call completion
    Patent number: 6735288
    Abstract: An IP telephony gateway and a voice mail resource enable a voice mail subscriber to place an outgoing call to a destination party from a voice mail session via a first Real Time Protocol (RTP) data stream according to the voice over IP (H.323) protocol, and resume the voice mail session upon completion of the outgoing call with the destination party. The voice mail resource initiates a second RTP data stream to a destination party, and uses the Empty Capability Set feature in the H.323 standard to cause the IP telephony gateway to close the first and second RTP data streams to the voice mail resource. The voice mail resource then issues Non-Empty Capability Set messages to the IP telephony gateway for the first and second RTP data streams, causing the IP telephony gateway to internally bridge the first and second RTP data streams, and later to resume the voice mail session.
    Type: Grant
    Filed: January 7, 2000
    Date of Patent: May 11, 2004
    Assignee: Cisco Technology, Inc.
    Inventors: David William Geen, Narasimha K. Nayak