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Author Topic: Glossary  (Read 36046 times)

roseway

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Glossary - O to Z
« Reply #15 on: March 29, 2009, 12:52:16 PM »

Glossary and Explanation of some of the common terms in use on this site.


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   0-9 
   

« Last Edit: March 30, 2009, 03:03:16 AM by kitz »
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Glossary - O
« Reply #16 on: March 29, 2009, 01:22:11 PM »

OEM - Original Equipment Manufacturer.

OLO - Other Licensed Operator(s)

OOo - OpenOffice.org, an open source suite of office software.

OP - Original Post.

OP - Original Poster.

Open Source - A term used to describe software which is supplied complete with the original programming source code.

OS - Operating System, the software which makes a computer work, and enables the user to install and run application programs.

OT - Off Topic.
« Last Edit: March 30, 2009, 02:08:43 AM by kitz »
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roseway

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Glossary - P
« Reply #17 on: March 29, 2009, 01:56:58 PM »

P2P - Peer to Peer. A distributed computer network in which each participant acts as both a server and a client. Commonly used for file sharing purposes.

PAP - Password Authentication Protocol. A simple unencrypted protocol to validate remote users logging on to a server. CHAP is generally preferred because it is more secure.

PATA - Parallel ATA. A parallel interface for disk drives, commonly referred to as IDE.

PC - Personal Computer. Generally used to refer to the 'IBM compatible' type of computer with an Intel compatible processor.

PCP - Primary Connection point (BT)

PCB - Printed circuit board.

PCI - Peripheral Component Interconnect. A widely used interface for plug-in boards in a computer.

PCIe - PCI Express. An enhanced version of the PCI interface for use with high performance graphics cards.

PCMCIA Personal Computer Memory Card International Association. An international standards organisation which maintains the standards for PC Cards and ExpressCards.

PCM Pulse-Code Modulation. A digital representation of an analogue signal, made by sampling the signal at frequent intervals.

PDF Portable Document Format. A file format for the exchange of documents, created by Adobe Systems.

PING - Network utility used to check the response of a remote server or computer.  How to use the PING command.

PM - Personal Message / Private Message.

PNG Portable Network Graphics. A file format for bitmapped graphics. Supports 24-bit colour but not animation, and primarily intended for transferring images over the internet.

PnP - Plug and Play. An operating system based facility for automatic installation of plug-in devices.

POI - Point Of Intervention. (BT)

PoP - Point of Presence.  Location or point where a network can be accessed. - See also Co location Centre.

POP3 Post Office Protocol v3. A commonly used protocol for the retrieval of emails from a server.

POS - Provision Of Service (BT)

POST - Power On Self Test. An early part of a computer's boot process, in which some tests are run to check the hardware.

POTS - Plain Old Telephone System.

PPC - Power PC. A type of processor used by Apple up to 2006, when they changed to the use of Intel processors.

PPP Point-to-Point Protocol. A data link protocol which is used to establish connection between two network nodes. Commonly used in dial-up internet connections.

PPPoA, PPPoE - PPP over ATM, PPP over Ethernet. Encapsulated forms of PPP used by ISPs to connect users to a DSL service.

PPPoA - PPP over ATM - BTw use ATM as on the exchange backhaul which sets up VCs (virtual Circuits) / VPs (Virtual Paths) for the routing - eg you enter VC and VPI nos when setting up your connection.

PPPoEoA - PPP over Ethernet over ATM - In the UK the vast majority of ISPs use PPPoA because they use the ATM backhaul from the exchange.  You may see some mention of PPPoE in the UK but in reality they likely use 'emulated' PPPoE (PPPoEoA) - still using the ATM backhaul.

PSTN - Public Switched Telephone Network

PSU - Power Supply Unit.

PVR - Personal Video Recorder.
« Last Edit: September 18, 2009, 11:15:52 PM by kitz »
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Glossary - Q
« Reply #18 on: March 29, 2009, 02:15:19 PM »

QAM - Quadrature Amplitude Modulation. Modulation method used to transmit adsl data.

QoS - Quality of Service. Control mechanisms for allocating and prioritising different data flows in a network. QoS is included in some routers, for example, to enable multiple users to each have a defined share of the capacity of the connection.

Quad Play - Combination of Landline, Mobile Phone, Broadband and Television services.
« Last Edit: March 29, 2009, 08:12:34 PM by kitz »
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Glossary - R
« Reply #19 on: March 29, 2009, 02:23:05 PM »

RADIUS - Remote Authentication Dial In User Service.  Authentication method used by ISPs to authorise your username and login.

RAID - Redundant Array of Independent / Inexpensive Disks. A means of distributing data over multiple disks so as to provide more security, or speed, or both.

RAM - Random Access Memory.

RAS - Remote Access Server.  More info on BT's RAS.

RAT - Request Auto Testing (BT)

RBAT - Request Background Automatic Test (BT)

REN - Ringing Equivalent Number. Each device plugged into the telephone line has a REN value. Maximum recommended REN is 4.

RF - Radio Frequency

RFI - Radio Frequency Interference

ROM - Read Only Memory

RSI - Repetitive Strain Injury

RTC - Real Time Clock

RWIN - Receive Window - See MTU and RWIN.
« Last Edit: April 02, 2009, 04:10:19 PM by mr_chris »
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kitz

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Glossary - S
« Reply #20 on: March 29, 2009, 02:40:04 PM »

SATA - Serial ATA. A serial interface for disk drives, now taking over from PATA (IDE)

SCP - Secondary Connection Point (BT)

SDSL - Symmetric Digital Subscriber Line.  DSL technology with the same upload and download data rate.

SHDSL - Single pair High bit rate Digital Subscriber Line.

SLA - Service Level Agreement.

SMF - Simple Machines Forum.  The software that runs forums such as this.

SMPF - Shared Metallic Path Facilities. LLU where the ISP provides broadband only.

SMTP - Simple Mail Transfer Protocol.

SNMP - Simple Network Management Protocol

SNR - Signal to Noise Ratio - SNR Explanation

SNRM - SNR Margin.

SNR Margin -  May also be known as Noise Margin. See SNR Margin Explanation

SP   - Service Provider(s).

SRA - Seamless Rate Adaption.  Explanation of SRA

SSB - Service Selection Barring.  Method used by BT to ensure that you can only log into the correct ISP - see adsl authentication.

Sync - Synchronisation with the exchange.

STM - Synchronous Transport Modules.

STM1 - 155.52Mbps

STM4 - 622 Mbps (4 * 155.52)

Sync Speed - Rate at which you connect to the exchange.
« Last Edit: July 14, 2009, 10:59:16 PM by kitz »
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Glossary - T
« Reply #21 on: March 29, 2009, 02:51:31 PM »

T&Cs - Terms and Conditions

TAM - Test Access Matrix.  ADSL diagnostic equipment - see Inside the BT Telephone Exchange

TCP - Transmission Control Protocol

TCP/IP - Transmission Control Protocol/Internet Protocol

TIA  - Thanks In Advance

TPON - Telecommunications over Passive Optical Networks

TPS - Telephone Preference Service.  Opt out register for unsolicited sales and marketing telephone calls.  See TPS

TLA - Three Letter Acronym

TLD - Top Level Domain

Tracert / Traceroute - Network utility used to check the routing to a remote server or computer.  How to use the Tracert command.

TY - Thank You.

TYVM - Thank You Very Much.

« Last Edit: March 30, 2009, 02:44:23 AM by kitz »
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roseway

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Glossary - U
« Reply #22 on: March 29, 2009, 04:17:25 PM »

UBC - Usage Based Charging. BT wholesale method of charging ISPs based on the amount of bandwidth used by their customers - More information CBC/UBC

UDP - User Datagram Protocol. One of the core internet protocols. With UDP a computer can send data to other hosts without having first to set up special channels or paths. Used for DNS, streaming media, many online games, etc.

UI - User Interface. The means by which a user interacts with the computer.

UPS - Uninterruptible Power Supply.

URI - Uniform Resource Identifier. A standardised way of specifying the address of an internet resource.

URL - Uniform Resource Locator. The full address of an internet resource, including the means of addressing it (e.g. http://www.bbc.co.uk).

URN Uniform Resource Name. A standardised way to specify the name of an internet device (as opposed to the URL which is its address).

USB - Universal Serial Bus. A hot-pluggable serial interface.

UTC - Coordinated Universal Time. For most purposes, equivalent to GMT.

« Last Edit: March 29, 2009, 08:00:04 PM by kitz »
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Glossary - V
« Reply #23 on: March 29, 2009, 06:47:07 PM »

VC - Virtual Circuit.  A link between 2 points on a network specifically to route between the locations over a circuit.

VC - Virtual Channel.  A communication channel between 2 points on an ATM network.

VC-Mux -  Virtual Circuit Multiplexing. 

VF - Voice Frequency

VFAT - Virtual FAT. An enhancement of the FAT file system to support long file names.

VHF - Very High Frequency.

VISP - Virtual ISP.  An ISP that resells or bundles products from other Internet Service Providers rather than their own dedicated products. 

VLF - Very Low Frequency.

VM - Virtual Machine, a means of installing an operating system inside another OS.

VM - Virtual Memory.  Extends RAM by using a portion of the hard drive.

VoD - Video on Demand. TV/Video Services available over the Internet streamed or downloaded to your PC.  Examples are BBC iPlayer, ITV Catchup, 4OD, BT Vision.

VoIP - Voice over IP. A general term for systems which deliver voice communications over the internet or other networks.

VP - Virtual Path. For more info see BT Virtual Paths.

VPI - Virtual Path Identifier.  Used in ATM networks to define the Virtual Path.

VPN - Virtual Private Network. A network in which some of the connections are made over another larger network, such as the internet.
« Last Edit: April 21, 2009, 05:30:37 AM by kitz »
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Glossary - W
« Reply #24 on: March 29, 2009, 07:01:17 PM »

W3C - World Wide Web Consortium. The international standards organisation for the world-wide web.

WAN - Wide Area Network.

WAP - Wireless Access Point.

WBC - Wholesale Broadband Connect.

WMBC - Wholesale Managed Broadband Connect.

WEP - Wired Equivalent Privacy. An encryption standard for wireless networks, now considered to be insecure.

Wi-Fi - Wireless Fidelity. A standard for interoperability between wireless devices.

WLAN - Wireless Local Area Network.

WPA - Wi-Fi Protected Access. An encryption standard for wireless networks, more secure than WEP.

WRT  - With Regard To / With Respect To.

WTH - What The Heck / What the Hell.

WWW - World Wide Web.

WYSIWYG - What You See Is What You Get. A term for document editing programs in which the editing display has the same appearance as the final document.
« Last Edit: March 30, 2009, 02:52:39 AM by kitz »
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Glossary - X
« Reply #25 on: March 29, 2009, 07:04:54 PM »

xDSL - Generic term encompassing all forms of DSL
« Last Edit: March 29, 2009, 07:54:12 PM by kitz »
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Glossary - Y
« Reply #26 on: March 29, 2009, 07:06:01 PM »

Y2K - Year Two Thousand.
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Glossary - Z
« Reply #27 on: March 29, 2009, 07:10:38 PM »

ZIF - Zero Insertion Force. A type of socket for integrated circuits, in which the IC is dropped freely into the socket and locked in place afterwards. Used for processors and similar devices.

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Glossary 0-9
« Reply #28 on: March 29, 2009, 08:22:36 PM »

21CN - 21st Century Network - BT Wholesale's upgrade for faster broadband and move from a PSTN (Public Switched Telephone Network) to an IP (Internet Protocol) System.

2G - Second Generation Mobile Technology.

3G - Third Generation Mobile Technology.  Allows faster services and access to the Internet.

4G - Fourth Generation Mobile Technology. "Super Fast" Mobile broadband - See Ofcom article here

« Last Edit: September 02, 2013, 03:08:33 PM by kitz »
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