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Glossary

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Virtual Call Capability
  • A user service feature in which a call set-up procedure and a call-clearing procedure will determine a period of communication between two DTEs in which user's data will be transferred by the network in the packet mode of operation. Note 1: This service requires end-to-end transfer control of packets within a network. Note 2: Data may be delivered to the network before the call setup has been completed but it will not be delivered to the destination address if the call setup attempt is unsuccessful. Note 3: All the user's data are delivered from the network in the same order in which they are received by the network. Multi-access DTEs may have several virtual calls in operation at the same time. See virtual call facility. See also call, data terminal equipment, network, permanent virtual circuit, virtual circuit.