This document provides an overview of videoconferencing concepts and equipment. It describes videoconferencing as the transmission of video and audio between two or more locations. Key components include cameras, displays, microphones, and speakers. Codecs compress the audio/video data and the network connection transmits it. Standards like H.323 enable interoperability. The document discusses Polycom as a leading videoconferencing equipment provider and reviews their product lines. It also covers benefits, limitations, and best practices for videoconferencing and videoconference-based learning.