To establish an effective videoconferencing link between sites, the sound and vision signals being transmitted and received must be of sufficiently high quality to enable clear, accurate communication without distracting the participants.

This signal quality will depend on:

• the physical, electrical and environmental characteristics of the conference room;
• the quality of the audio visual and videoconferencing equipment in use;
• the correct adjustment of the audio visual and videoconferencing equipment;
• the type, and satisfactory adjustment, of the network linking the conferencing sites.