Partner Solutions

Glossary of Telecom Terms : L

Even experts need occasional help with telecom terms. We have combined glossaries from several sources to simplify finding the definitions you need.

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L

 

LAN
See Local Area Network.

 

LAN Extension Service (LES)
An Ethernet Service offered through Verizon Wholesale that provides bandwidth at increments of 10 Mbps, 100 Mbps and 1Gbps without incurring major capital costs and with minimal ongoing operating expenses. Learn more.

 

Landline
A telephone circuit that travels over land-based circuits (as opposed to wireless).

 

LATA
See Local Access and Transport Area.

 

LATA Access
The origination or termination of interLATA telecommunications for an Interexchange Carrier; this includes provision of network control signaling, answer supervision, automatic calling number identification, carrier access codes, directory services, testing and maintenance of facilities and the provision of information necessary to bill end user customers.

 

LATA Locator
A web-based tool offered through the Verizon Wholesale website that enables customers to determine where a Local Exchange Carrier (LEC) can carry traffic and where an Interexchange Carrier (IXC) is needed to carry traffic between LATAs.

 

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
See Local Exchange Carrier.

 

LERG
See Local Exchange Routing Guide.

 

Letter of Authorization
A document that indicates if a Carrier or CLEC/Reseller is acting as an end user's agent. This Authorization needs to be kept on file with the Carrier or CLEC/Reseller. Learn more.

 

LIDB
See Line Information Data Base.

 

LIDB Service
A database for alternative billing arrangements. LIDB queries return information about the billing and privacy features associated with the line number entries stored in the database service that contains information about billing and privacy features associated with line numbers. Learn more.

 

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 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. Learn more.

 

Line Loss Report
See Provider Notification (PN).

 

Line Ports
A Verizon Wholesale UNE offering that provides a physical interface to the line side of Verizon's central office switch. Thus, access to local switching capabilities, including telephone numbers, Primary Interexchange Carriers, 911/E911 and vertical features, is enabled. Learn more.

 

Line Ports with Centrex Capabilities
A Verizon Wholesale UNE offering whereby service providers who are collocated in a Verizon central office can purchase Centrex capabilities on unbundled Analog and Basic Rate ISDN line ports in that office. Learn more.

 

Line Sharing
A Verizon Wholesale service offering providing the means for a Local Service Provider (LSP) to order service configurations that will allow them to place a digital data service on a subscriber loop currently providing Verizon analog voice services to an end user. This is offered only under a commercially negotiated agreement called VISTA. Learn more.

 

Line Splitting
A Verizon Wholesale service that enables partnering CLECs to offer customers integrated voice and data service over an unbundled voice service subscriber loop. Learn more.

 

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
See Local Number Portability.

 

LNP Database Query Service
A database service offered through Verizon Wholesale that provides single-source access to Verizon's network routing database of ported telephone numbers.  

LOA
See Letter of Authorization.

 

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. A LEC can be either a Bell Operating Company or an independent company.

 

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 Number Portability Center
This Verizon center serves as point of entry for inter-working with the Competitive Local Exchange Carrier (CLEC) and Incumbent Local Exchange Carrier (ILEC) community and the national Number Portability Administration Center (NPAC) vendor.

 

Local Number Portability (LNP) Query
A query during call processing to a Local Number Portability (LNP) database that attempts to find LNP routing information.

 

Local Service Area
The geographic calling area in which a local end user does not incur toll charges.

 

Local Service Interface
A server-based Verizon-provided application that allows CLECs/Resellers to send and receive Pre-Order, Order, Order Status and Trouble Administration transactions using a web browser. It is used in the Verizon East region. Learn more.

 

Local Service Interface - Trouble Administration (LSI-TA)
The Verizon Local Service Interface (LSI) is a server-based Verizon-provided application that allows CLECs/Resellers to send and receive Trouble Administration transactions using a web browser. Learn more.

 

Local Service Ordering Guidelines (LSOG)
Industry guidelines, as sponsored by the OBF and ATIS, for pre-ordering and ordering local service. These guidelines outline the forms, data elements, and business rules necessary to create a local service request.

 

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.

Specific to CMRS Providers, Local Traffic means traffic that is originated by an end user customer of Verizon and terminates to an end user customer of the CMRS Provider within the same Major Trading Area (MTA) and within the same LATA.

 

Local Trunk
Trunk lines between local exchanges.

 

Local Usage Detail (LUD)
Use: A report requested by CLECs and Resellers that shows Local Usage for Measured and Message Rate end users.

 

Local Usage Rate Indicator
A rate for the Local Service usage traffic type represented.

 

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.

 

Location Porting Inquiry
A Verizon Wholesale local pre-order transaction that allows the Competitive Local Exchange Carrier(CLEC) to determine if their customer's telephone number may be location ported to another service address within a rate center.

 

Location Routing Number (LRN)
Used for the Local Number Portability addressing scheme, referring to the following: the 10-digit subscriber telephone number, the 10-digit switch identifier in an area of portability.

 

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 Make-Up Inquiry
A Verizon Wholesale local pre-order transaction that provides the Competitive Local Exchange Carrier (CLEC) with the physical make-up of the facilities at the selected location. Learn more.

 

Loop Qualification
Categorizes certain physical characteristics of a loop prior to order placement.

 

Loop Qualification Inquiry
The Loop Qualification inquiry allows the CLEC to qualify loop facilities for service prior to submitting a Local Service Request (LSR). Learn more.

 

Loop Qualification Extended Inquiry
A Verizon Wholesale local pre-order transaction that allows the CLEC to qualify facilities for ISDN service prior to submitting a Local Service Request (LSR). Learn more.

 

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.

 

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.

 

LSI
See Local Service Interface.

 

LSI-TA
See Local Service Interface-Trouble Administration.

 

LSI-TA Buddy
An on-line self-service module of Local Service Interface-Trouble Administration that allows look-ups of Trouble Administration Codes, Greenwich Mean Time (GMT) conversions, and Dispatch Recommendations. Learn more.

 

LSR
See Local Service Request.

 

 

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