Avistar Communications is adding support for SIP to its video server operating system. The AvistarVOS software is designed to integrate video and data applications in a transport-independent, scalable platform. The software also incorporates presence-based calling and "find-me/follow-me" user location information. Avistar's video suite is expected to, over time, utilize SIP to allow a broader and easier integration of voice, video, data and third-party applications. Hhttp://www.avistar.com