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Jargon Buster
The du Pré Jargon Buster found the following for - LNos 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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| LAN | Local Area Network. A way of linking computers (and portable computers) so they can share the same information, software, hard disks, printers and so on, as necessary | |
| Last Mile | The colloquial term for the Local Loop | |
| Layer | In the OSI reference model, layer refers to a collection of related functions within a communications system, with a defined path to layers above and below | |
| LBU | A BT term – Local Business Unit | |
| LCD | Liquid Crystal Diode. Typically used for flat PC screens, telephones, calculators, etc | |
| LCR | Least Cost Routing. Now referred to as ARS since ‘least’ cannot be guaranteed | |
| LD | see Loop Disconnect | |
| LDAP | Lightweight Directory Access Protocol, is an emerging software protocol for enabling anyone to locate organizations, individuals, and other resources such as files and devices in a network, whether on the Internet or on a corporate intranet. LDAP is a "lightweight" (smaller amount of code) version of DAP (Directory Access Protocol), which is part of X.500, a standard for directory services in a network | |
| Leased Line | see Private Circuit | |
| LED | Light Emitting Diode. A small indicator light. Can emit one, two or three colours | |
| LES1 | An obsolete BT SHDS term for LAN Extension Service 1, which provided 10Mbit/s Ethernet over a 2km radial distance. BT provided any necessary equipment | |
| LES10 | A BT SHDS term LAN Extension Service. 10Mbit/s, over a 25km radial distance. BT provided any necessary equipment | |
| LES100 | A BT SHDS term LAN Extension Service. 100Mbit/s, over a 25km radial distance. BT provided any necessary equipment | |
| LES1000 | A BT SHDS term LAN Extension Service. 1Gbit/s, over a 25km radial distance. BT provided any necessary equipment | |
| LES155a | A BT SHDS term. An ATM LAN Extension Service, which provides 155Mbit/s for 2 sites. BT provided any necessary equipment | |
| LES155b | A BT SHDS term. An ATM LAN Extension Service, which provides 155Mbit/s for 3 sites. BT provided any necessary equipment | |
| LES2 | An obsolete BT SHDS term for LAN Extension Service 2, which provided 10Mbit/s Ethernet over a 3.9km radial distance | |
| LES3a | A BT SHDS term for Token Ring LAN Extension Service. 4 or 16Mbit/s, for 3 or more sites, over a 25km radial distance. BT provided any necessary equipment | |
| LES3b | A BT SHDS term for Token Ring LAN Extension Service. 4 or 16Mbit/s, for 2 or more sites, over a 25km radial distance. BT provided any necessary equipment | |
| LES622a | A BT SHDS term. An ATM LAN Extension Service, which provides 622Mbit/s for 2 sites. BT provided any necessary equipment | |
| LES622b | A BT SHDS term. An ATM LAN Extension Service, which provides 622Mbit/s for 3 sites. BT provided any necessary equipment | |
| LF | A radio transmission term. Low Frequency. 0 kHz – 300 kHz | |
| Light | Rented or leased. Eg, ‘Light Fibre’ means fibre which is rented from someone else – see ‘Dark’ | |
| Line Hunting | Where a call from a PTO's network can be presented to the first free line of a group of lines | |
| Line of Sight | Usually refers to radio communication. If you are physically able to see the receiving aerial from the exact position of the transmitting aerial, with nothing whatsoever in the way, it is called Line of Sight | |
| Link | see Data Link | |
| Litigation Protection | Litigation protection is both the review and recording of Internet, intranet and extranet communications that is done in order to avoid litigation or the documentation of the communications parties and content in the event of litigation. | |
| LJU | Line Jack Unit. A telephone socket. When connecting to a PSTN line, a ‘master’ LJU is required to enable incoming ringing and provide a measure of lightning protection. Any other LJU connected to the line must be an ‘extension’ LJU | |
| LJU Adaptor | Converts the plug on the end of a telephone to an RJ45 | |
| LLL | A BT SHDS term. Logical Link Layer | |
| LLU | Local Loop Unbundling. A BT/Oftel term. Where Oftel requires BT to allow other PTOs to use the cable BT has installed to connect a subscriber to the local BT exchange (known as the local loop), at a point before the cables connect to any of BT’s exchange equipment. The initial planned date for this is mid-2001 | |
| LMI | A Frame Relay term. Local Management Interface | |
| Local Bus | A method of speeding up the components in the PC by connecting them direct to the processor. Mainly used for video connection, but sometimes for the HD | |
| Local Device | A peripheral device, such as a printer, that connects direct to a work station rather than the file server | |
| Local Loop | i) The telephone company's wires from the local exchange which connect to the subscriber, often referred to as the 'Last Mile' ii) A test mode for datacomms equipment to check local equipment is functioning |
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| Lo-call | A BT Inbound Service product. Originally launched as 0345, now 0845 | |
| LocalTalk | Apple Computer's proprietary cabling system for conecting PCs, Macintoshes and peripherals using a CSMA/CD access method | |
| Loop Disconnect | Loop Disconnect. Another term for Dial Pulse | |
| Loop Disconnect | Another term for Dial Pulse | |
| LTE | Line Termination Equipment | |
| LTU | Line Terminating Unit | |
| LVD | Low Voltage Directive |