Patents by Inventor David A. Grabelsky
David A. Grabelsky 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).
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Patent number: 8547967Abstract: A method for rerouting IP (Internet Protocol) telephony call information includes, during an active IP telephony call made by a first IP telephony phone for originating IP telephony calls over an IP network, with a boundary element, actively detecting a network failure condition in the IP network which indicates a switchover to a PSTN (Public Switched Telephone Network) network and generating a failure notification; and with a server for receiving the failure notification, generating a dynamic switchover instruction generated that is sent to the first IP telephony phone, the dynamic switchover instruction initiating automatic switchover of the active IP telephony call to a PSTN network. A method for rerouting IP (Internet Protocol) telephony call information includes, with a server, monitoring an IP network for route failures; and with the server, generating a switchover instruction when an active IP telephony call is interrupted by a route failure.Type: GrantFiled: June 21, 2011Date of Patent: October 1, 2013Assignee: Hewlett-Packard Development Company, L.P.Inventors: David A. Grabelsky, Michael Homeier
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Patent number: 8539552Abstract: A system and method for network based policy enforcement of intelligent-client features is provided. An operator of an IP telephony and/or IP multimedia network may enforce authorization or privileges of intelligent end-user clients to utilize or invoke services in the network. A network policy enforcement point is maintained in the network by elements that are under control of the network operator. The network policy enforcement point controls access to, and invocation of, features and services that may otherwise be delivered to subscribers without the knowledge or authorization of the network. The network policy enforcement point receives messages, associates the message with a known service, makes a determination as to whether a beneficiary of the service is authorized to invoke the service, and then filters the messages based on the determination.Type: GrantFiled: September 25, 2003Date of Patent: September 17, 2013Assignee: Hewlett-Packard Development Company, L.P.Inventors: David Grabelsky, Anoop Tripathi, Michael Homeier, Guanglu Wang
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Patent number: 8509225Abstract: Providing enhanced emergency services (E-911) to an IP Telephony-based PBX or similar system, by utilizing aspects of the intelligence of end-user SIP client devices to address challenges and difficulties associated with E-911-like services in LAN-based telephony environments.Type: GrantFiled: July 8, 2011Date of Patent: August 13, 2013Assignee: Hewlett-Packard Development Company, LPInventors: David Grabelsky, Michael Homeier, Anoop Tripathi, Boby Joseph
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Publication number: 20110273979Abstract: A method for rerouting IP (Internet Protocol) telephony call information includes, during an active IP telephony call made by a first IP telephony phone for originating IP telephony calls over an IP network, with a boundary element, actively detecting a network failure condition in the IP network which indicates a switchover to a PSTN (Public Switched Telephone Network) network and generating a failure notification; and with a server for receiving the failure notification, generating a dynamic switchover instruction generated that is sent to the first IP telephony phone, the dynamic switchover instruction initiating automatic switchover of the active IP telephony call to a PSTN network. A method for rerouting IP (Internet Protocol) telephony call information includes, with a server, monitoring an IP network for route failures; and with the server, generating a switchover instruction when an active IP telephony call is interrupted by a route failure.Type: ApplicationFiled: June 21, 2011Publication date: November 10, 2011Inventors: David A. Grabelsky, Michael Homeier
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Publication number: 20110267986Abstract: Providing enhanced emergency services (E-911) to an IP Telephony-based PBX or similar system, by utilizing aspects of the intelligence of end-user SIP client devices to address challenges and difficulties associated with E-911-like services in LAN-based telephony environments.Type: ApplicationFiled: July 8, 2011Publication date: November 3, 2011Applicant: 3Com CorporationInventors: David Grabelsky, Michael Homeier, Anoop Tripathi, Body Joseph
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Patent number: 8027333Abstract: Providing enhanced emergency services (E-911) to an IP Telephony-based PBX or similar system, by utilizing aspects of the intelligence of end-user SIP client devices to address challenges and difficulties associated with E-911-like services in LAN-based telephony environments.Type: GrantFiled: September 5, 2008Date of Patent: September 27, 2011Assignee: Hewlett-Packard CompanyInventors: David Grabelsky, Michael Homeier, Anoop Tripathi, Boby Joseph
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Patent number: 7990955Abstract: A method and system for rerouting IP telephony call information. The system includes an existing IP telephony call, the telephony call originating at a first IP telephony phone. A second IP telephony phone receiving the IP telephony call from the first IP phone and a network routing condition, the routing condition causing the IP telephony call to be rerouted. A switchover instruction, the switchover instruction initiating a switchover of the existing IP telephony call to a PSTN.Type: GrantFiled: September 23, 2009Date of Patent: August 2, 2011Assignee: Hewlett-Packard CompanyInventors: David A. Grabelsky, Michael Homeier
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Patent number: 7860089Abstract: A method and system for network based call-pickup is provided. In one embodiment a first user agent communicates in a communication session with a second user agent in a network telephony system. The second user agent may request that a third user agent replace the second user agent in the communication. The third user agent may be a park server, and when it replaces the second user agent, the communication session may thereby be parked at the park server. A fourth user agent may then request that the third user agent (e.g., park server) initiate a communication session between the first user agent and the fourth user agent. The third user agent may then instruct the first user agent to communicate with the fourth user agent. The parked communication session may thereby be picked up by the fourth user agent.Type: GrantFiled: July 16, 2008Date of Patent: December 28, 2010Assignee: Hewlett-Packard CompanyInventors: Anoop Tripathi, David A. Grabelsky, Guanglu Wang
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Publication number: 20100107226Abstract: A system and methods are shown for providing presence state services in an Internet Protocol network. One exemplary system includes a central presence element configured to track and provide user presence state information, and a local presence element in communication with the central presence element and further in communication with a signaling entity. According to one embodiment, the local presence element is configured to create and manage local presence state authorization data generated based on user presence state information being received from the central presence element. Further, the local presence element is configured to authorize a user service request using the local presence authorization data before providing access to a service requested by the user in the user service request.Type: ApplicationFiled: January 4, 2010Publication date: April 29, 2010Applicant: 3COM CORPORATIONInventors: David Grabelsky, Anoop Tripathi, Michael Homeier, Guanglu Wang
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Patent number: 7702726Abstract: A system and methods are shown for providing presence state services in an Internet Protocol network. One exemplary system includes a central presence element configured to track and provide user presence state information, and a local presence element in communication with the central presence element and further in communication with a signaling entity. According to one embodiment, the local presence element is configured to create and manage local presence state authorization data generated based on user presence state information being received from the central presence element. Further, the local presence element is configured to authorize a user service request using the local presence authorization data before providing access to a service requested by the user in the user service request.Type: GrantFiled: April 10, 2002Date of Patent: April 20, 2010Assignee: 3Com CorporationInventors: David Grabelsky, Anoop Tripathi, Michael Homeier, Guanglu Wang
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Publication number: 20100061228Abstract: A method and system for rerouting IP telephony call information. The system includes an existing IP telephony call, the telephony call originating at a first IP telephony phone. A second IP telephony phone receiving the IP telephony call from the first IP phone and a network routing condition, the routing condition causing the IP telephony call to be rerouted. A switchover instruction, the switchover instruction initiating a switchover of the existing IP telephony call to a PSTN.Type: ApplicationFiled: September 23, 2009Publication date: March 11, 2010Applicant: 3Com CorporationInventors: David A. Grabelsky, Michael Homeier
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Patent number: 7634577Abstract: A Media Gateway proxy receives a message and parses the message. The message contains an attribute, sub-command, and a destination address. The proxy stores the message and the attributes. Each of the attributes corresponds to a selected one of a plurality of Media Gateways. Each of the gateways has an address. The proxy finds in the memory the address of the selected Media Gateway using the destination address and the attribute. The proxy then forms a message using said sub-command, said address, and said attribute and transmits the message to the destination Media Gateway.Type: GrantFiled: April 19, 2004Date of Patent: December 15, 2009Assignee: 3Com CorporationInventors: David A. Grabelsky, Boris Bekkerman, John Poplett, Sudhakar Ramakrishna
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Patent number: 7613170Abstract: A method and system for rerouting IP telephony call information. The system includes an existing IP telephony call, the telephony call originating at a first IP telephony phone. A second IP telephony phone receiving the IP telephony call from the first IP phone and a network routing condition, the routing condition causing the IP telephony call to be rerouted. A switchover instruction, the switchover instruction initiating a switchover of the existing IP telephony call to a PSTN.Type: GrantFiled: June 29, 2004Date of Patent: November 3, 2009Assignee: 3Com CorporationInventors: David A. Grabelsky, Michael Homeier
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Patent number: 7564835Abstract: A system and method for maximizing the use of bandwidth optimization techniques in a voice-over-packet telephony system. In exemplary embodiments, the VOP system includes a plurality of telephones connected to a VOP telephony system. Upon receiving request to initiate a VOP connection, the end office switch connects to an originating softswitch for signaling functions and to an originating media gateway for transporting the media associated with the VOP connection. A connection information system accessible to the softswitch maintains connection information relating to media sessions between the originating media gateway and a plurality of candidate terminating media gateways. The connection information system may be accessed during connection initiation and advantageously used to determine whether there are nearly-simultaneously occurring and distinct media sessions having common endpoints such that bandwidth optimization techniques may be implemented.Type: GrantFiled: November 6, 2002Date of Patent: July 21, 2009Assignee: 3Com CorporationInventors: David Grabelsky, Anoop Tripathi, Boris Bekkerman, Michael Homeier
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Patent number: 7480723Abstract: A method and system for providing directory based services is provided. The directory service may process an ambiguous destination identifier from a call-session request to multiple database entries in a directory server, and return an appropriately constructed response that can be interpreted by a user as a prompt for additional input to refine the destination identifier. The possible matches could be sent as a list of possible choices. The user can then select the desired match from the list and send a follow-on request including the selection to the directory server. Based on the selection, the directory server will then either send additional possible matches to the user or obtain a contact address corresponding to the selection. After resolving the ambiguous match to a unique destination identifier, a call can then be established.Type: GrantFiled: April 8, 2003Date of Patent: January 20, 2009Assignee: 3Com CorporationInventors: David Grabelsky, Anoop Tripathi, Michael Homeier, Sudhakar Ramakrishna
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Publication number: 20090003535Abstract: Providing enhanced emergency services (E-911) to an IP Telephony-based PBX or similar system, by utilizing aspects of the intelligence of end-user SIP client devices to address challenges and difficulties associated with E-911-like services in LAN-based telephony environments.Type: ApplicationFiled: September 5, 2008Publication date: January 1, 2009Applicant: 3Com CorporationInventors: David Grabelsky, Michael Homeier, Anoop Tripathi, Boby Joseph
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Publication number: 20080298361Abstract: A method and system for network based call-pickup is provided. In one embodiment a first user agent communicates in a communication session with a second user agent in a network telephony system. The second user agent may request that a third user agent replace the second user agent in the communication. The third user agent may be a park server, and when it replaces the second user agent, the communication session may thereby be parked at the park server. A fourth user agent may then request that the third user agent (e.g., park server) initiate a communication session between the first user agent and the fourth user agent. The third user agent may then instruct the first user agent to communicate with the fourth user agent. The parked communication session may thereby be picked up by the fourth user agent.Type: ApplicationFiled: July 16, 2008Publication date: December 4, 2008Applicant: 3Com CorporationInventors: Anoop Tripathi, David Grabelsky, Guanglu Wang
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Patent number: 7453815Abstract: Gateway routers for real-time networks have the ability to collect delay, loss, and jitter statistics on a per-connection basis. It is possible to use this information not only to monitor the quality of individual voice calls and other real-time connections, but also to evaluate the overall performance of the underlying network. This paper describes a method for monitoring and managing the performance of a real-time data network that supports voice, video and other real-time services. In the described embodiments, the RTCP mechanisms of RTP for sender and receiver reporting be used to relay performance information to one or more network monitoring sites for analysis and interpretation. In addition, gateway routers are organized and managed within a hierarchy that allows the monitoring function to localize it view of network conditions within the hierarchy; and the monitoring of network performance can occur on various time scales.Type: GrantFiled: December 15, 2003Date of Patent: November 18, 2008Assignee: 3Com CorporationInventors: David A. Grabelsky, Ikhlaq S. Sidhu, Guido M. Schuster, Jacek A. Grabiec
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Patent number: 7450560Abstract: A method to support the assignment of a globally unique network public address and, optionally, a number of locally unique ports to a first private network subdevice having a private network address on a network access system from a second private network subdevice having a public network address using Realm Specific Internet Protocol, wherein the public network address is used by the first private network device to communicate with network devices on an external network.Type: GrantFiled: May 31, 2000Date of Patent: November 11, 2008Assignee: 3Com CorporationInventors: David A. Grabelsky, Michael S. Borella, John Poplett, Richard J. Dynarski
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Patent number: 7440442Abstract: Providing enhanced emergency services (E-911) to an IP Telephony-based PBX or similar system, by utilizing aspects of the intelligence of end-user SIP client devices to address challenges and difficulties associated with E-911-like services in LAN-based telephony environments.Type: GrantFiled: October 21, 2003Date of Patent: October 21, 2008Assignee: 3Com CorporationInventors: David Grabelsky, Michael Homeier, Anoop Tripathi, Boby Joseph