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Value-Added Reseller (VAR)

A company that takes an existing product, adds its own "value," usually in the form of a specific piece of hardware or specialized application and resells it as a new product.

VAR

See Value-Added Reseller (VAR).

Virtual Local Area Network (VLAN)

A local area network that maps workstations on some basis other than geographic location (e.g. by department, user class, or primary application).

Visitor Location Register (VLR)

A database that contains temporary information concerning mobile subscribers who are currently located in a given mobile switching office serving area that is different from their Home Location Register (HLR). When a mobile subscriber roams away from his home location and into a remote location, SS7 messages obtain information about the subscriber from the HLR, and create a temporary record for the subscriber in the VLR.

See also Mobile Switching Office (MSO).

VLAN

See Virtual Local Area Network (VLAN).

Vocoder

A voice codec used for the compression/decompression of voice signals in order to reduce and thus conserve the bandwidth or bit-rate of the voice stream.

See also Codec (Coder/Decoder or Compression/Decompression).

Voice-over-IP (VoIP)

A term used in IP telephony to describe a set of facilities for managing the delivery of voice information using the Internet Protocol (IP). In general, this means sending voice information in digital form in discrete packets rather than in the traditional circuit-committed protocols of the public switched telephone network (PSTN).

Voice-over-Wi-Fi

Voice-over-IP technology optimized for a Wi-Fi network.

See also Voice-over-IP (VoIP).

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