What is WebEx Telepresence? How do WebEx and Telepresence come together?

WebEx Telepresence allows participants in WebEx meetings to connect via video with participants using Telepresence video conferencing endpoints (traditional H.323 and SIP videoconferencing). Standard room based videoconferencing systems use H.323 or SIP as the protocol to connect rooms and control the call. Traditional manufacturers, like Cisco and Polycom, use these protocols. WebEx on the other hand, uses a proprietary protocol that is unable to directly communicate with traditional room systems.