Cisco TelePresence

Cisco TelePresence, first introduced in October 2006, is a range of products developed by Cisco Systems designed to link two physically separated rooms so they resemble a single conference room regardless of location.
Cisco documented the Telepresence concept and implementation details in the book Cisco TelePresence Fundamentals, where the difference between Telepresence and the at this point in time prevalent Videoconferencing is defined as quality, simplicity, and reliability.
Products.
These were the initial products:
They were designed for an experience to feel as if local and remote participants are in the same room. These products offer features including up to three 1080p flat panel displays, special tables, microphones, speakers, cameras, collaboration interfaces and lighting.
In 2008 Cisco reported to have sold about 2,000 rooms, with about another 250 non-revenue (internal and philanthropic) units installed.
Later other products were developed that expanded the use-cases for smaller offices and Webex connectivity.
In 2010 Cisco acquired the Norwegian company Tandberg and integrated their products into the Cisco portfolio.
Currently there is a wide range of collaboration endpoints and conferencing infrastructure products offered.