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Jargon Buster
The du Pré Jargon Buster found the following for - VNos A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
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Term
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Explanation
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| V. | The V-series Recommendations from the ITU-T regarding data/communications over the switched telephone network | |
| V.1 | Equivalence between binary notation symbols and the significant conditions of a two condition code | |
| V.10 | Electrical characteristics for unbalanced double-current interchange circuits for general use with integrated circuit equipment in the field of data communications | |
| V.11 | The same as V.10, but for balanced double-current interchange circuits | |
| V.110 | Equivalent to I.463 | |
| V.120 | Rate adaption standard, currently in draft form only | |
| V.13 | Answerback unit simulator | |
| V.15 | Use of acoustic coupling for data transmission | |
| V.16 | Recommendation for modems for transmission of medical analogue data | |
| V.17 | 14,400Kbit/s fax transmission | |
| V.19 | Modems for parallel data transmission using telephone signalling frequencies | |
| V.2 | Power levels for data transmission over telephone lines | |
| V.20 | Parallel data transmission modems standardised for universal use in the general switched network | |
| V.21 | 300 baud modem standardised for use in the switched telephone network | |
| V.22 | 1200bit/s full duplex 2 wire modem standardised for use in the general switched telephone network | |
| V.22bis | 2400bit/s full duplex 2 wire modem standardised for use in the general switched telephone network | |
| V.23 | 600/1200bit/s modem standardised for use in the general switched telephone network | |
| V.24 | i) The list of definitions of interchange circuits between data terminal equipment and data circuit terminating equipment, such as a modem ii) The telecommunications term for an RS232 port |
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| V.25 | Automatic calling and/or answering equipment on the general switched telephone network | |
| V.25bis | Automatic calling and/or answering equipment on the general switched telephone network using the 100 series interchange circuits | |
| V.26 | 2400bit/s modem for use on 4 wire point to point circuits | |
| V.26bis | 2400bit/s duplex modem using the echo cancellation technique standardised for use on the general switched telephone network, and on point to point 2 wire leased telephone type circuits | |
| V.27 | 4800bit/s modem for a leased circuit | |
| V.27bis | 4800/2400bit/s modem with automatic adaptive equaliser standardised for use on leased circuits | |
| V.27ter | 4800/2400bit/s modem standardised for use on the general switched telephone network | |
| V.28 | Electrical characteristics for unbalanced double current interchange circuits | |
| V.29 | 9600bit/s modem for use on leased circuits | |
| V.3 | International Alphabet No. 5 | |
| V.31 | Electrical characteristics for single current interchange circuits controlled by contact closure | |
| V.32 | A family of 2 wire duplex modems operating at data signalling rates up to 9600bit/s for use on general switched telephone type circuits | |
| V.32bis | A family of 2 wire duplex modems operating at data signalling rates up to 14400bit/s for use on the general switched telephone network and on 2 wire leased telephone type circuits | |
| V.32ter | An extension of V.32bis to include 19200bit/s transmission over 2 wire circuits | |
| V.33 | 14400bit/s modems for leased circuits | |
| V.34 | 2 wire duplex modems operating at data signalling rates up to 28800bit/s for use on the general switched telephone network and on 2 wire leased circuits | |
| V.34bis | 33Kbit/s full duplex 2 wire modem standardised for use on the general switched telephone network | |
| V.35 | i) Data transmission at 48Kbit/s using 60-108KHz group band circuits ii) Interface for SMDS at 5Mbit/s |
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| V.36 | Modems for synchronous data transmission using 60-180KHz group band circuits | |
| V.37 | Synchronous data transmission at a data signalling rate higher than 72Kbit/s using 60-108KHz group band circuits | |
| V.4 | General structure of signals of the International Alphabet No. 5 code for data transmission over public telephone networks | |
| V.40 | Error indication with electromagnetic equipment | |
| V.41 | Code independent error control system | |
| V.42 | Error correcting technique base on LAP-M protocol | |
| V.42bis | Compression technique for use with V.42 | |
| V.5 | Standardisation of modulation rates and data signalling rates for synchronous data transmission in a general switched network | |
| V.50 | Standard limits for transmission quality of data transmission | |
| V.51 | Organisation of the maintenance of internal telephone type circuits used for data transmission | |
| V.52 | Characteristic of distortion and error rate measuring apparatus for data transmission | |
| V.54 | Loop test devices for modems | |
| V.55 | Specification for an impulsive noise measuring instrument of telephone type circuits | |
| V.56 | Comparative tests for modems for use over telephone type circuits | |
| V.57 | Comprehensive data test set for high data signalling rates | |
| V.6 | The same as V.5 but on leased telephone-type circuits | |
| V.7 | Definition of terms concerning data communications over the telephone network | |
| V.90 | 56Kbit/s full duplex 2 wire modem standardised for use on the general switched telephone network | |
| VA | An electricity power rating. The relationship between VA and watts is: VA x 0.7 = watts | |
| VADS | Value Added Data Services provide extra or specialised services (such as on-line data bases) which are not offered by normal public networks | |
| ValueCall | A BT Inbound Service Product. STD codes are typically 0891, 0894, 0897 & 0898. Call revenue is split between BT and the service provider | |
| VANS | Value Added Network Services. A Network that provides extra specialised facilities above and beyond the normal carrier services, by adding computer control and communications | |
| VASS | Value Added Service Supplier. An intermediate supplier between BT and the subscriber, providing the subscriber with the ability to use BT's Digital Select Service of User to User signalling | |
| VBR | Variable bit rate. Where the rate of data transmission can vary between set paramaters according to the current line conditions | |
| VC | Virtual Circuit | |
| VDSL | Very High Speed Digital Subscriber Line. Very high speed asymmetric DSL usable over very short distances. Potential use as ‘last mile’ link from fibre equipped cabinets. Still in development. 13-52 Mbit/s downstream & 1.5-2.3Mbit/s upstream. Cannot be used with PSTN. Maximum distance at 13Mbit/s is 1.3km, and at 52Mbit/s is 0.3km - see xDSL, ADSL, HDSL & DSL Lite | |
| VDU | Visual Display Unit. Typically, the self-contained unit which houses the screen for a PC. Sometimes referred to as a Monitor | |
| Vendor Independent | Hardware or software that will work with hardware and software manufactured by other vendors. The opposite of Proprietary | |
| VESA | Video Standards Association | |
| VGA | Video Graphics Array. Supports mono and colour resolutions to 640 x 480 pixels | |
| VHF | A radio transmission term. Very High Frequency. 30 MHz - 300 MHz | |
| Virtual Circuit | In networks, the feature which gives to the user the appearance of an end-to-end circuit without an actual physical connection being set up | |
| VLAN | Virtual LAN protocol which allows totally independent networks over the same topology | |
| VLSI | Very Large Scale Integrated Circuits | |
| VN3 | The ISDN access signalling system (equivalent to DASS2) in France | |
| VoIP | Where voice (or video) is transmitted over the Internet, using an IP address, a unique address number allocated every time you log onto the Internet. Increasingly being used by telephone systems. There are half-way stages with this scenario, with the ultimate being Pure IPT which does not use an in-house telephone system, but a hosted system, thereby offering the full benefits this technology brings |
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| VOX | Usually indicates something that is Voice Activated | |
| VPN | Virtual Private Network | |
| VRAM | Video RAM. A special form of RAM used by a video adaptor to run a VDU | |
| VRML | An Internet term. Virtual Reality Modelling Language. A standard that allows the real world to be modelled across the Internet |