Provides a permanent virtual circuit, the customer appears to have a continuous dedicated connection, without having to pay for a full time leased line, the service provider figures out the route each frame travels and charges based on usage.

Internet Phone

A phone capable of using the placing a call over the internet, rather than using traditional lines.

ISDN

Integrated Services Digital Network

Digital network in which the same time-division switches and digital transmission paths are used to establish connections for different services. ISDN services  can include telephone, email, data and facsimile.

IXC Miles

For a price quote, the coordinates of location y and location z are used to calculate mileage-dependent line charges.

LAN

Local Area Network

A transmission network encompassing a limited area, such as a single building or several buildings in close proximity; widely used to link personal computers so that they can share information and peripheral devices

Land Line

Common name for conventional copper lines

Line

Term used for the physical medium in which communication travels on.

Line Noise

Signal interference that degrades the quality of communication.

Local Access Provider

A company that is authorized to provide local access.

Local Loop

The communications channel, usually a physical line, between the subscriber's location and his local central office. Also known as the subscriber loop.