A list of virtual channels, containing for each virtual channel a service identifier and a pointer to service description information for the virtual channel. A Virtual Channel Map consists of multiple Virtual Channel Descriptions.

A television service in which a continuous stream flows in real time from the service provider to the terminal device and where the user cannot control the temporal order in which contents are delivered. Also known as a Linear TV Service.

A communications arrangement in which data from a source user may be passed to a destination user over various real circuit configurations during a single period of communication.
Note: Virtual circuits are generally set up on a per-call basis and are disconnected when the call is terminated; however, a permanent virtual circuit can be established as an option to provide… (Read More →)

A network-provided service feature in which a user is provided with a virtual circuit.
Note: Virtual circuit capability is not necessarily limited to packet mode transmission. For example, an analog signal may be converted to a digital signal and then be routed over the network via any available route.

A logical connection that is made to a virtual circuit.

A wideband protocol that is used to transport digital data packets arriving from the channelized side in HDLC frames. [T1.509-1995]

An alias for an IP address or server operated by an Internet Presence Provider or an Internet Service Provider. The virtual domain allows individuals or companies to have a domain name without the effort and cost of maintaining a server. [Bahorsky]

The apparent height of an ionized layer, as determined from the time interval between the transmitted signal and the ionospheric echo at vertical incidence.

Synonym teletraining.

A computer network using internetworks as data links that are transparent for users and that do not have restrictions on protocols, so that the network has the characteristics of a local area network.
Note: Data links over internetworks often use tunneling. [2382-pt.35]