I have 30 years of experience, and specialize in the field of telecommunications with specific knowledge in the areas of call processing, networking and audio and video encoding technologies. I have published on such topics as voice over Internet protocol (VoIP), business and operations support systems and the use of Moving Picture Experts Group (MPEG) standards. I have testified 10 times on topics such as call center technology, network architectures and services and location based services. As an expert witness, I was able to invalidate claims that had been confirmed in re-exam before the KSR decision.