Abstract: In one embodiment, a method includes obtaining a first message from an application associated with a variable bit-rate (VBR) media flow, the first message including information that has at least an approximately minimum bandwidth at which the VBR media flow may operate and an amount by which a bandwidth of the VBR media flow may be trimmed. The method also includes determining an amount of available bandwidth in a network, and identifying the approximately minimum bandwidth at which the VBR media flow may operate and the amount by which the bandwidth of the VBR media flow may be trimmed. Finally, the method includes identifying a bandwidth allocation identified based on the amount of available bandwidth in the network, the approximately minimum bandwidth at which the VBR media flow may operate, and the amount by which the bandwidth of the VBR media flow may be trimmed.

Abstract: A test results screening tool allows capture of test item and test results data and provides a reviewer with a robust set of tools for entering screening criteria and display of test results by both test subject and test center. The tool includes parametrically sets flags for unwanted testing behaviors including test item harvesting, test subjects with pre-knowledge of the test subject matter, and proxy test takers for some a portion of a test.

Abstract: In one embodiment, a method includes reserving a first amount of bandwidth with respect to a path in response to a reservation request from a sender. The reservation request specifies a plurality of acceptable amounts of bandwidth including the first amount of bandwidth and a second amount of bandwidth. The first amount of bandwidth is less than the second amount of bandwidth. The method also includes determining, after reserving the first amount of bandwidth, that additional bandwidth sufficient to accommodate the second amount of bandwidth is available, and automatically providing a first indication that the additional bandwidth is available. Automatically providing the first indication that the additional bandwidth is available includes providing the first indication to at least the sender. Finally, the method includes obtaining a second indication, the second indication being arranged to indicate whether the second amount of bandwidth may be accommodated with respect to the path.

Abstract: In one embodiment, a method includes obtaining a request from a first endpoint to establish a session, determining whether a resource reservation may be established post-ring, and identifying a second endpoint to establish the resource reservation post-ring when it is determined that the resource reservation may be established post-ring. The method also includes notifying the second endpoint of the request and ringing the second endpoint. Notifying the second endpoint of the request includes notifying the second endpoint that the resource reservation may be established post-ring.

Abstract: In one embodiment, a method includes obtaining a message associated with a data flow that includes a first indicator that identifies an amount of requested pool bandwidth and a second indicator that identifies a pool with which the data flow is associated. The pool is associated with a plurality of data flows that includes the data flow. The method also includes determining whether the pool has an overall bandwidth allocation, and, if so, determining whether reserving the amount of requested bandwidth would cause the overall bandwidth allocation to exceed a maximum pool bandwidth allocation. Finally, the method includes reserving approximately the amount of requested bandwidth when it is determined that reserving the amount of requested bandwidth would not cause the overall bandwidth allocation to exceed the maximum pool bandwidth allocation. Reserving approximately the amount of requested bandwidth includes increasing the overall bandwidth allocation by the amount of requested bandwidth.

Abstract: In one embodiment, a method includes obtaining a first message from an application associated with a variable bit-rate (VBR) media flow, the first message including information that has at least an approximately minimum bandwidth at which the VBR media flow may operate and an amount by which a bandwidth of the VBR media flow may be trimmed. The method also includes determining an amount of available bandwidth in a network, and identifying the approximately minimum bandwidth at which the VBR media flow may operate and the amount by which the bandwidth of the VBR media flow may be trimmed. Finally, the method includes identifying a bandwidth allocation identified based on the amount of available bandwidth in the network, the approximately minimum bandwidth at which the VBR media flow may operate, and the amount by which the bandwidth of the VBR media flow may be trimmed.

Abstract: In one embodiment, a method includes obtaining a request from a first endpoint to establish a session, determining whether a resource reservation may be established post-ring, and identifying a second endpoint to establish the resource reservation post-ring when it is determined that the resource reservation may be established post-ring. The method also includes notifying the second endpoint of the request and ringing the second endpoint. Notifying the second endpoint of the request includes notifying the second endpoint that the resource reservation may be established post-ring.

Abstract: In one embodiment, a method includes reserving a first amount of bandwidth with respect to a path in response to a reservation request from a sender. The reservation request specifies a plurality of acceptable amounts of bandwidth including the first amount of bandwidth and a second amount of bandwidth. The first amount of bandwidth is less than the second amount of bandwidth. The method also includes determining, after reserving the first amount of bandwidth, that additional bandwidth sufficient to accommodate the second amount of bandwidth is available, and automatically providing a first indication that the additional bandwidth is available. Automatically providing the first indication that the additional bandwidth is available includes providing the first indication to at least the sender. Finally, the method includes obtaining a second indication, the second indication being arranged to indicate whether the second amount of bandwidth may be accommodated with respect to the path.

Abstract: In one embodiment, a method includes receiving an indication of an availability from a primary registration server that is associated an endpoint associated an Internet Protocol (IP) protocol. The method also includes determining whether the primary registration server is available, and notifying the endpoint that the primary registration server is available if the primary registration server is available.

Abstract: A test results screening tool allows capture of test item and test results data and provides a reviewer with a robust set of tools for entering screening criteria and display of test results by both test subject and test center. The tool includes parametrically sets flags for unwanted testing behaviors including test item harvesting, test subjects with pre-knowledge of the test subject matter, and proxy test takers for some a portion of a test.

Abstract: In one embodiment, a method includes obtaining a message associated with a data flow that includes a first indicator that identifies an amount of requested pool bandwidth and a second indicator that identifies a pool with which the data flow is associated. The pool is associated with a plurality of data flows that includes the data flow. The method also includes determining whether the pool has an overall bandwidth allocation, and, if so, determining whether reserving the amount of requested bandwidth would cause the overall bandwidth allocation to exceed a maximum pool bandwidth allocation. Finally, the method includes reserving approximately the amount of requested bandwidth when it is determined that reserving the amount of requested bandwidth would not cause the overall bandwidth allocation to exceed the maximum pool bandwidth allocation. Reserving approximately the amount of requested bandwidth includes increasing the overall bandwidth allocation by the amount of requested bandwidth.

Abstract: Techniques are provided for making reservations between a calling device and one or more called devices using the Expeditious Resource Reservation Protocol (E-RSVP). An example technique involves sending an invite message from the calling device to one or more called devices over a data network. In response to the invite message, each of the called devices transmits a resource reservation message to the calling device. The resource reservation messages may be, for example, a Resource Reservation Protocol (RSVP) message. Based on the information in the received resource reservation messages, the calling device establishes reservations with each of the called devices.

Abstract: In one embodiment, interworking procedures between H.323 and SIP ensure that in-band tones and announcements, along with local and remote ringback, are properly played or generated.

Abstract: In one embodiment, interworking procedures between H.323 and SIP ensure that in-band tones and announcements, along with local and remote ringback, are properly played or generated.

Abstract: A cluster of alternate gatekeepers handles the load of a single logical zone. The alternate gatekeepers exchange signals among each other according to a special cluster protocol. Each alternate gatekeeper may be connected and exchange signals with endpoint devices.

Abstract: A cluster of alternate gatekeepers handles the load of a single logical zone. The alternate gatekeepers exchange signals among each other according to a special cluster protocol. Each alternate gatekeeper may be connected and exchange signals with endpoint devices.