Emulates a physically circuit switched network connection over a packet switched network. Presents data as a "virtual circuit" so higher protocols do not have to deal with the overhead of handling frames.
Virtual Local Area Network (VLAN)
A group of devices on one or more LANs that are configured through software to act as if they were attached together physically. Because it is a logical, software association rather than through physical hardware, VLAN membership is easier to manage.
Virtual Path Identifier (VPI)
Eight bit field in the header of an ATM cell. Together with the VCI (virtual channel identifier), it identifies the next destination of a cell as it passes through an ATM switch.
Virtual Private LAN Service (VPLS)
The Virtual Private LAN Service over MPLS-TP allows you a mesh of sites any-point-to-any-point with Layer 2 tunnels for services such Ethernet connectivity and multicast video.
Virtual Private Network (VPN)
Allows users to access a private, secured network over public TCP/IP infrastructure. Useful for traveling businessmen or salespeople to access an enterprise's intranet (internal network). Encrypts data at the IP level.
Video Terminal (VT-100)
VT-100 is a type of terminal first built by DEC (Digital Electronics Corporation) in the 1970s. It's style and it's attributes were so popular that it became a de facto standard for terminal emulators. New monitors and computers since the 2000s have made the concept of a traditional video terminal obsolete. However, a new computer can run VT-100 emulator software to interface with legacy equipment. Many Loop products can connect to a computer's DB9 port. Then the user can open a VT-100 emulator software to access the device.
Voice Quality Enhancement (VQE)
Noise reduction, echo cancellation, and other techniques used to improve the quality of a telephone call.
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