Wireless Glossary – V

The communication protocol from ITU for 28.8 kbps modems. Also known as V.Fast.

On CSU/DSU devices, V.35 is a physical serial interface standard that is most commonly used for 56 Kbps and 64 Kbps data rates.

V.90 is an ITU-T recommendation for a modem, allowing 56 kbit/s download and 33.6 kbit/s upload. It was developed between March 1998 and February 1999. It is also known as V.Last as it was anticipated to be the last standard to be developed.

V.92 is an ITU-T modem standard allowing near 56 kbit/s download and 48 kbit/s upload rates first presented in August 1999. It is intended to succeed the V.90 standards. With V.92 PCM is used for both the upstream and downstream connections; previously 56K modems only used PCM for downstream data.

In IGRP and EIGRP, this multiplier allows these routing protocols to load balance over unequal paths.

Virtual Circular Buffer is the Circular Buffer used for rate matching in LTE.

Voice Call Continuity is specified in order to describe how a voice call can be persisted, as a mobile phone moves between circuit switched and packet switched radio domains.

Voltage-Controlled Oscillator is an electronic oscillator designed to be controlled in oscillation frequency by a voltage input.

Vertical Cavity Surface Emitting Laser

Through a service provider network, this is a logical connection that tricks the attached routers into believing that they are directly connected.

A VPN utilizes public networks to conduct private data communications. Most VPN implementations use the Internet as the public infrastructure and a variety of specialized protocols to support private communications through the Internet.

A Data Link layer technique of segmenting broadcast domains. A VLAN is a group of hosts possessing a common set of requirements. This group communicates as if they were connected to the same broadcast domain and switch, no matter their physical location.

Visitor Location Register is a database which stores information about all the mobiles that are currently under the jurisdiction of a Mobile Switching Centre (MSC) that it serves.

This design, which requires classless routing, allows for the allocation of the IP sub-net depending on the needed number of hosts for that subnet.

Also known as auxiliary VLANs, voice VLANs allocate a separate broadcast domain on an access port to logically segment and manage VoIP signals.

Voice over Internet Protocol commonly refers to the communication protocols, technologies, methodologies, and transmission techniques involved in the delivery of voice communications and multimedia sessions over IP networks, such as the Internet. Other terms commonly associated with VoIP are IP telephony, Internet telephony, voice over broadband (VoBB), broadband telephony, IP communications, and broadband phone.

VoIP is a technology that allows telephone calls to be made over computer networks like the Internet. VoIP converts analog voice signals into digital data packets and supports real-time, two-way transmission of conversations using Internet Protocol.

A VPN utilizes public networks to conduct private data communications. Most VPN implementations use the Internet as the public infrastructure and a variety of specialized protocols to support private communications through the Internet.

Virtual Private Network is a technology for using the Internet or another intermediate network to connect computers to isolated remote computer networks that would otherwise be inaccessible. A VPN provides varying levels of security so that traffic sent through the VPN connection stays isolated from other computers on the intermediate network, either through the use of a dedicated connection from one “end” of the VPN to the other, or through encryption. VPNs can connect individual users to a remote network or connect multiple networks together.