g procurement. Compare system features relative to how well-documented they are for each product considered. What type of system interface is provided with the system? Is the control unit a push button-type device, a touch-screen based unit, a PC keyboard, wireless remote or electronic tablet and stylus based? Can the document camera be controlled from the primary system control unit or operator's console? If the system's primary control unit is not a PC, is a PC keyboard also used to activate or change any system features that a conferee would commonly need during a conference? Which ones? Does the product offer camera presets? Does it offer far-end camera control? Does the product offer picture-in-picture? In a dual-monitor arrangement what can be seen in the window? A single-monitor arrangement? Video Communication: the Whole Picture Can audio-only conferees be part of conference? How many audio-only conferees can be included? How are conferences set up? Describe process. Can frequently-dialed numbers be stored? How many speed dialing numbers can be stored? How are they activated? Do codecs automatically handshake to determine compatible algorithm? Can the system be placed in a multipoint mode, and support a multipoint conference? Does the product offer on-line help? Is it backward compatible with codec manufacturer's previous products? Describe fully. Does the product offer continuous presence? Does the product offer scheduling software? Does the product offer applications sharing? What OSs (e.g., MacOS, Linux)? Audio considerations List the names of proprietary audio algorithms offered and describe them. What range of frequencies is encoded with the above? Is bandwidth assignment flexible? How are adjustments made? What method is used to eliminate echoes? If echo cancellation is used, is a burst of noise used to acquaint the system with the room? Or, does unit use voices to train acoustic line-side echo cancellers? What is the echo cancellation system's convergence time measured in milliseconds? What is the 