A call, established over a network, that uses the capabilities of either a real or virtual circuit by sharing all or any part of the resources of the circuit for the duration of the call.

A service feature in which (a) a call set-up procedure and a call disengagement procedure determine the period of communication between two data terminal equipments (DTEs) in which user data are transferred by the network in the packet mode of operation, (b) end-to-end transfer control of packets within the network is required, (c) data may be delivered to the network… (Read More →)

Synonym virtual call capability.

In radio or carrier systems in which no carrier is transmitted, e.g., single sideband or double sideband with suppressed carrier, the location in the frequency spectrum that the carrier would occupy if it were present.

The communication channel associated with a virtual channel connection (VCC) that provides for the transport of asynchronous transfer mode (ATM) cells among ATM active elements. A VCC is an association established at the ATM Layer between two or more endpoints for the purpose of user-user, user-network, or network-network information transfer. A VCC consists of the concatenation of virtual channel links… (Read More →)

A concatenation of VCLs (virtual channel links) that extends between the points where the ATM (asynchronous transfer mode) service users access the ATM Layer. The points at which the ATM cell payload is passed to, or received from, the user of the ATM Layer (i.e., a higher layer or ATM management entity) for processing, signifying the endpoints of a VCC.… (Read More →)

Contains the parameters necessary to acquire and display particular AV content. A Virtual Channel Description is made up of one or more Programming Sources. In addition, where possible, a priori knowledge is given of certain parameters required to receive and decode the virtual channel. This may include video and audio codecs.

A means of unidirectional transport of ATM cells between the point where a VCI value is assigned and the point where that value is translated or removed. [T1.630-1999]

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.