ls DSUB 25 to Conversion Digital audio XLR jack DSUB 25 to (DB 15) XLR jack Doremi HDVI-20 HD-SDI HD-SDI HD-SDI HDlink (BNC) Analog video (DVI) (BNC) YUN (4:2:2) Blackmagic HDlink Common projector AJA HD10A converter HD professional projector FIGURE 2.19 Ultragrid testing scenario. © 2009 by Taylor & Francis Group, LLC SIP Handbook: Services, Technologies, and Security videoconferencing, becoming a DVTS and UltraGrid videoconferencing sys- tem. Figure 2.18 shows the SIP message exchange to establish and terminate a basic videoconferencing session, using an OpenSer as a SIP server. Figure 2.19 shows the current testing scenario with Ultragrid, to demon- strate that, regardless of the complexity of the media transport, SIP can signal it. References [1] Rosenberg, J., H. Schulzrinne, G. Camarillo, A. Johnston, J. Peterson, R. Sparks, M. Handley, and E. Schooler. 2002. SIP: Session Initiation Protocol. IETF RFC 3261. June. [2] Hurtado, M., A. Oller, and J. Alcober. 2006. The SIP-CMI platform - An open testbed for advanced integrated continuous media services. TRIDENTCOM 2006. Barcelona, Spain, March. [3] Hiroshi, W., and S. Junichi. 2006. A service-oriented design framework for secure network applications. In AU: Proceedings of the 30th IEEE International Conference on Computer Software and Applications Con- ference (COMPSAC). Chicago, September 17-21. [4] Liu, F., W. Chou, L. Li, and J. Li. 2004. WSIP - Web service sip end- point for converged multimedia/multimodal communication over IP. In Web Services, 2004. Proceedings. IEEE International Conference, 690 97. June 6-9. [5] W3C. 2005. Voice Browser Call Control: CCXML Version 1.0, W3C Working Draft. http://www.w3.org/TR/ccxml/, June 29. [6] Dyke, J.V., E. Burger, and A. Spitzer. 2006. Media Server Control Markup Language (MSCML) and Protocol. IETF RFC 4722. November. [7] Saleem, A., Y. Xin, and G. Sharratt. 2007. Media Server Markup Lan- guage (MSML). Internet Draft (draft-saleem-msml-05). August 17. [8] Melanchuk, T. 2008. An Architectural Framework for Media Serv