In telecommunication, a virtual call capability, sometimes called a virtual call facility, is a service feature in which:
- 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
- end-to-end transfer control of packets within the network is required
- data may be delivered to the network by the call originator before the call access phase is completed, but the data are not delivered to the call receiver if the call attempt is unsuccessful
- the network delivers all the user data to the call receiver in the same sequence in which the data are received by the network
- multi-access DTEs may have several virtual calls in progress at the same time.
Famous quotes containing the words virtual and/or call:
“Neither dead nor alive, the hostage is suspended by an incalculable outcome. It is not his destiny that awaits for him, nor his own death, but anonymous chance, which can only seem to him something absolutely arbitrary.... He is in a state of radical emergency, of virtual extermination.”
—Jean Baudrillard (b. 1929)
“Considering the absence of legal coercion, the surprising thing is that men have for so long, and, on the whole, so reliably, adhered to what we might call the “breadwinner ethic.””
—Barbara Ehrenreich (b. 1941)