Video communication policy at CERN

Many video images are transmitted around the CERN site. The main sources of these images are the beam observation cameras in the accelerators, site and machine access control cameras, and "teletext" pages showing various information such as machine status. Other images transmitted around the site include broadcasts of important meetings between conference rooms. Many methods of transmission and distribution of these images are in use. Some of the systems in use date from the very early days of the laboratory, whereas the newest systems use the latest technology. This paper will give an overview of the systems in use at CERN today, and present different options for rationalisation.