Brix Networks has recently received patent number 7,058,020 covering a technique for time stamping data packets in order to measure network characteristics. This technique can be used to measure latency and jitter. VoIP and video quality will be a growing area of the IP communications market and Brix is one of a number of companies looking to associate themselves with this space. They call the market the converged service assurance solutions space but you can think of them as working to better the QoS of media on IP networks.