A system and method for allowing legacy circuit switch user equipment to operate via a packet switch system, such as an IP Multimedia Subsystem system, is provided. The computer-implemented method includes gathering information about potentially malicious websites from a plurality of sources. The host computer receives a request to provide virtual environment content including imagery data associated with the virtual environment to the client computer, and provides a content stream including a plurality of content data segments containing virtual environment content at a content stream bandwidth based on an event stream bandwidth associated with the event stream to the client computer. A voltage limited device limits voltage across the contacts of a solid state relay. The Formula imidazotriazines inhibit protein kinase activity thereby making them useful as anticancer agents. The reference generator provides alternating positive and negative voltage levels, where the positive voltage level forward biases the bipolar photo-detector and the negative voltage level reverse biases the bipolar photo-detector.