Loop Start

A method of demanding dial tone from the central office by completing an electrical pathway between the outbound and return conductors of a telephone line.

Leased Circuit
Dedicated channel equipment and common carrier facilities used by a group to furnish exclusive private line service.

LEC Billing

Local Exchange Carrier bills the customer for telecommunications services.

Letter of Agency ( LOA)

Document that authorizes changing the service provider.

Local Access

The connection from a customer to the Central Office. The portion of a circuit connecting with a customer's premise equipment across the local network

MAN
Metropolitan Area Network.

Covers a large city.  A network larger than a campus, Interconnects 2 or more LANs

Modem
Modulator/demodulator.

A device that both modulates and demodulates signals  In computer communications, a modem is used for converting digital signals into, and recovering them from, analog signals, over analog communications channels

Network
Interconnection of three or more communicating entities.

Network Interface
The point of interconnection between a user terminal and a private or public network.

NIC

Network Interface Card
Card that is installed in an expansion slot of a computer to provide network

access

Network Loss
Loss added to the network to control echo.

OC

Optical Carrier