Abstract: An expert protocol analyzer, which records a protocol exchange between two or more hardware devices on a network or software modules in a multiprogramming environment. To validate a potential fix, the protocol is replayed in a simulated network environment, where a replay unit replaces the endpoint that is not available in the lab, or which in the lab operates with a different timing. The replay unit behaves like one of the two original units of the. Individual messages are adjusted for the local network parameters and are sent with precise delay or timing recorded during the original exchange. This allows the user to recreate the failure scenario in the test lab.

Abstract: A computer method for testing a test unit that includes receiving an output of the test unit into a testing system, providing an expert system operably connected to the testing system, comparing, in the expert system, the output with an expected result for the output, and determining, in the testing system, if the output complies with the expected result. A system for testing a test unit includes a testing module for receiving an output of the test unit, and an expert system for comparing the output with an expected result for the output and for determining if the output complies with the expected result.

Abstract: A system and method for using asymmetric companion codecs to establish and maintain a communication. A communication system endpoint replaces instances of a companion codec with the members of a group of all of the companion codecs for the endpoint and performs appropriate translations of compatible codecs to provide a communication between communication system endpoints.

Abstract: Systems and methods are provided for re-synchronizing video and audio data. The systems and methods compare a video count associated with a video jitter buffer with a predefined video count. A given audio silence period in audio data associated with an audio jitter buffer is adjusted in response to the video count of the video jitter buffer being outside a predetermined amount of the predefined video count, until the video count is within the predetermined amount of the predefined video count.

Abstract: An expert system that provides an analysis of protocol exchanges and protocol relationships across multiple data units, such as packets, of a network and within data units themselves is described. The system collects a number of facts and based on rules governing the data units, new rules and facts are gained from the analysis. The invention is extensible for additional protocols and diagnostics by updating a knowledge database with dynamic rules for any application or protocol desired.

Abstract: An expert protocol analyzer, which records a protocol exchange between two or more hardware devices on a network or software modules in a multiprogramming environment. To validate a potential fix, the protocol is replayed in a simulated network environment, where a replay unit replaces the endpoint that is not available in the lab, or which in the lab operates with a different timing. The replay unit behaves like one of the two original units of the. Individual messages are adjusted for the local network parameters and are sent with precise delay or timing recorded during the original exchange. This allows the user to recreate the failure scenario in the test lab.

Abstract: A computer method for testing a test unit that includes receiving an output of the test unit into a testing system, providing an expert system operably connected to the testing system, comparing, in the expert system, the output with an expected result for the output, and determining, in the testing system, if the output complies with the expected result. A system for testing a test unit includes a testing module for receiving an output of the test unit, and an expert system for comparing the output with an expected result for the output and for determining if the output complies with the expected result.

Abstract: A system and method for using asymmetric companion codecs to establish and maintain a communication. A communication system endpoint replaces instances of a companion codec with the members of a group of all of the companion codecs for the endpoint and performs appropriate translations of compatible codecs to provide a communication between communication system endpoints.

Abstract: An expert system that provides an analysis of protocol exchanges and protocol relationships across multiple data units, such as packets, of a network and within data units themselves is described. The system collects a number of facts and based on rules governing the data units, new rules and facts are gained from the analysis. The invention is extensible for additional protocols and diagnostics by updating a knowledge database with dynamic rules for any application or protocol desired.