| http://www.w3.org/ns/prov#value | - As you would expect, they are more expensive than desktop videoconferencing products but much more affordable than full-scale telepresence systems.I looked at the LifeSize Passport videoconferencing system; some telepresence vendors, such as Tandberg/Cisco and Polycom, also offer modular systems.LifeSize PassportLifeSize Communications, a division of Logitech, offers multiple videoconferencing products
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