Glossary
A B C D E F G H I J K L M N O P Q R S T U V W X Yvariable bit rate (VBR) - A data transmission that can be represented by an irregular grouping of bits or cell payloads followed by unused bits or cell payloads.
VDSL - See very high bitrate digital subscriber line. very high bitrate digital subscriber line (VDSL) An asymmetric DSL that delivers from 13 to 52 megabits per second downstream bandwidth and 1.5 to 2.3 megabits per second upstream.
video on demand (VOD) - A pay-per-view television service in which a viewer can order a program from a menu and have it delivered instantly to the television set, typi-cally with the ability to pause, rewind, etc.
Videoconference - Interactive, audiovisual communication among three or more people at two or more sites.
Virtual Reality Markup Language (VRML) - A computer language that provides a three-dimensional environment for traditional Internet browsers, resulting in a simple form of virtual reality available over the Internet.
VOD - See video on demand.
VRML - See virtual reality markup language.
