Glossary - L
Browse Glossary Terms
L
LAN
Landline
A telephone circuit that travels over land-based circuits (as opposed to wireless).
LATA
See Local Access and Transport Area.
LD
See Long Distance.
Leakage
The resistance between the conductors of an insulated metallic pair or the resistance between each conductor of an insulated metallic pair and ground.
LEC
Lifeline
Lifeline and Link Up are two programs sponsored by the Federal Communications Commission (FCC) that provide telecommunications service discounts to low income households. Lifeline provides a discount off the monthly rate for a single telephone line.
Line Charge (FCC)
The Federal Subscriber Line Charge is an access charge authorized by the Federal Communications Commission (FCC). This charge defrays a portion of the fixed costs of providing access to the local network. This charge may also be call the Federal Access Charge.
Line Hunt
Sets up office phone lines in a prearranged sequence to forward unanswered calls from one line to another until it reaches the last line in the group. Learn more.
Line Information Data Base (LIDB)
Databases owned individually by Verizon and other entities that provide data such as calling card validation for telephone line number cards issued by Verizon and other entities. An LIDB also contains validation data for collect and third number-billed calls; for example, Billed Number Screening.
Line Status Verification (LSV)/Verification with Call Interruption (VCI)
Refers to an operator request for a status check on the line of a called party. The request is made by one party's operator to an operator of the other party. The verification of the status check is provided to the requesting operator. (Known as Busy Line Verification/Busy Line Verification Interrupt Traffic (BLV/BLVI) in Verizon North.)
Line-Side Termination
An end office switch connection that provides transmission, switching and optional features suitable for customer connection to the public switched network, including loop start supervision, ground start supervision, and signaling for BRI-ISDN service.
Line Termination (LT)
Equipment that terminates a BRI or Centrex BRI digital subscriber line on the network side of the network to the end user (or CLEC) interface. Alternatively, electronics at the ISDN network side of the user-network interface that complement the electronics equipment.
Link
Physical connection between two nodes in a network; can consist of a data communication circuit or a direct channel (cable) connection. For example, Digital high capacity links conditioned for 1.544 megabits per second are called 1.5Mbps Links, when terminated on the POT bay at the CLEC's Collocation presence in the local exchange carrier's central office where the end user is served.
Link Up
Lifeline and Link Up are two programs sponsored by the Federal Communications Commission (FCC) that provide telecommunications service discounts to low income households. Link Up provides a discount off of the initial costs of installing a single telephone line at an end user's primary residence.
LNP
LNP Cost Recovery
The FCC allows local telephone companies to recover certain costs for providing telephone number portability to its customers. Telephone number portability allows residential and business customers to retain, at the same location, their existing local telephone numbers when switching from one local telephone service provider to another. The LNP Charge is a fixed, monthly charge. This charge is not a tax.
Local Access and Transport Area
A geographic area within a telephone company's franchised territory which has been established in accordance with the Modification of Final Judgment (MFJ) for the purpose of defining the area within which a telephone company may offer services.
Local Area Network (LAN)
A short-distance data communications network. LANs are typically within a building or campus, and to link together computers and peripherals under a standard protocol. The network provides high-bandwidth communications over coaxial cable, twisted-pair, fiber, or microwave media. LANs are usually owned by the user.
Local Bridge
A bridge that directly interconnects networks in the same geographic area.
Local Calling Area
A geographical area, as defined in the local exchange carrier's Local and/or General Exchange Service tariff, in which an end user (Telephone Exchange Service subscriber) may complete a call without incurring toll charges.
Local Exchange
A local exchange is the local central office of a LEC Lines from homes and businesses terminate at a local exchange. Local exchanges connect to other local exchanges within a LATA or to Interexchange Carriers also known as long-distance carriers.
Local Exchange Carrier
As defined in the Telecommunications Act of 1996, a company certified by the Federal Communications Commission (FCC) to provide local exchange telecommunications service.
Local Exchange Routing Guide
A document issued by Telcordia (formerly Bellcore), that is used to identify NPA-NXX routing and homing information, as well as network element and equipment designation. It contains a listing of local routing data such as destination codes, switching entities, rate centers and locality information by LATA. The LERG is an essential tool for network planning.
Local Exchange Service
A telecommunications service that connects a subscriber to the Public Switched Telephone Network (PSTN).
Local Loop
The part of a communications circuit between the subscriber's equipment and the equipment in the local exchange. More formally, a transmission path that extends from the vertical side of a main distribution frame, DSX-panel, or functionally comparable piece of equipment in the subscriber's serving end office to the rate demarcation point (or Network Interface Device) in or at an end user's premises. Also known as the subscriber loop, local line and access line.
Local Loop Primary IntraLATA Carrier
The carrier selected by the end-user customer to handle local traffic.
Local Number Portability
The process by which an end user can retain the same telephone number regardless of which local service provider he/she chooses. The ability for phone numbers to be moved between local service providers is accomplished by shared access to a numbering database. Also known as Location Portability.
Local Service Area
The geographic calling area in which a local end user does not incur toll charges.
Local Service Provider (LSP)
The company that provides an end user with the ability to place and receive local telephone calls. The same company may serve as a conduit for the end user to place and receive long distance calls.
Local Service Request (LSR)
Form sent to Local Exchange Carrier requesting local telephone services.
Local Switching System
A system that establishes connections between access lines and interoffice trunks. Access line ports are located on the line side of the local switching system; trunk ports are located on the trunk side of the local switching system.
Local Traffic
Refers to telecommunications traffic that originates with an end user of one party and terminates to the end user of the other party within Verizon's current local serving area, including mandatory local calling scope arrangements.
Local Trunk
Trunk lines between local exchanges.
Location Portability
The process by which an end user can retain the same telephone number after changing local service provider. The ability to move phone numbers between local service providers is accomplished by shared access to a numbering database. Also known as Local Number Portability (LNP).
Location Ported Number
A telephone number that has been moved from one Verizon wire center and/or exchange area to another Verizon wire center and/or exchange area.
Long Distance
Telephone service to a destination outside the local service area of the calling station, whether inter-LATA or intra-LATA, and for which there is a charge beyond that for basic service.
Loop
See Local Loop.
Loop Qualification
Categorizes certain physical characteristics of a loop prior to order placement.
Loop Reverse-Battery Signaling
A type of switched-access line DC signaling that uses loop-open and loop-closure signals in one direction, and normal battery polarity and reverse battery polarity in the other direction to indicate on-hook and off-hook signals. Categorizes certain physical characteristics of a loop prior to order placement.
Loopback
A diagnostic test in which a signal is transmitted across a medium while the sending device waits for its return.
Loop-Start Signaling (LS)
A type of switched access line signaling in which the network provides a battery source. To initiate a call, customer premise equipment will provide a loop closure that causes DC loop current to flow, which is detected by the network.
Lottery
A method authorized by Congress which was designed to provide an alternative to competitive hearings for allocating airwave spectrum space to competing applicants in various services; for example, wireless telecommunications, television, radio, etc.
PLIC/Local Loop Primary IntraLATA Carrier
See Local Loop Primary IntraLATA Carrier.
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