 video communication system administrator. This individual trains system users, provides assistance with the equipment, schedules the rooms, coordinates with equipment and network services suppliers, and manages other related activities at the site. A video communication coordinator is often assigned to assist users at smaller sites (field or satellite locations) where a full-time person is not necessary. Some companies rely on participants to handle most of the technical operations on their own and provide training and support over the system. When this is the case, ease-of- use is crucial. Independent access to technical help must also be provided (e.g., a separate voice line for requesting assistance in case of system malfunction, and a serial line to allow a technician to remotely manage the system via modem. It is also important to install back-up systems in videoconferencing rooms such as speakerphones to support audio conferencing if the video fails. A single individual at each site should assume responsibility for the system installed there. That person does not have to be technical, but must know the basics of system operation and troubleshooting. In locations where technical expertise is not strong, well-trained personnel and complete, accurate and easy-to-use system documentation is critical. Documentation should indicate what type of equipment is installed, the software revision, initial equipment settings, how to interpret on-screen error messages, and technical support information. It should also address the operation of peripherals (e.g., document cameras. The room should also include a checklist of common problems and how to resolve them. Technical support is often more complex than suppliers imply. Vendors may not intentionally minimize the support burden associated with video communication, but it often takes on a life of its own after installation. Only set-top systems and good roll-abouts really deliver plug-and-play operation. Additional components such as inverse multiplexers, document camer