Glossary - I
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I
IEEE
See Institute of Electrical and Electronic Engineers.
ILEC
See Incumbent Local Exchange Carrier.
Impulse Noise
Any momentary occurrence of noise on a channel that significantly exceeds the normal noise peaks. Impulse noise is analyzed by counting the number of occurrences that exceed a threshold.
Incumbent Local Exchange Carrier (ILEC)
In the Telecommunications Act of 1996 with respect to an area, the Incumbent Local Exchange Carrier is defined as the Local Exchange Carrier that, on the date of enactment of the Act, provided telephone exchange service in that area; for example, Verizon.
Independent Telephone Company
A Local Exchange Carrier other than a Regional Bell Operating Company.
Inside / Outside Ringing
Also referred to as distinctive ring, is a feature that provides the ability to distinguish the origin of an incoming call by the use of a different ringing pattern.
Inside Wire Maintenance Plan
Maintenance Plans (which include Sentry I, II and III) provide business and residence customers with a telephone maintenance plan.
Inside Wiring
Telephone wiring on the customer's side of the rate demarcation point, the point located on the subscriber's side of the telephone company's protector or other device serving the same purpose. For residences, the protector is usually located at the point where the telephone lines enter the house.
Inside Wiring Maintenance Plans
See TeleSure Plus Wire Maintenance Plan.
Institute of Electrical and Electronic Engineers
Professional organization that defines network standards.
Integrated Digital Loop Carrier
A subscriber loop carrier system that integrates within the switch, generally at a DS1 level, twenty-four local link (loop) voice-grade equivalent transmission paths combined into a 1.544 megabits per second digital signal.
Integrated Access
Integrated Access packages from Verizon integrate voice and data communications services into one easy-to-manage platform. See FlexGrow/T1 or T1 Integrated Data and Voice.
Integrated Services Digital Network (ISDN)
A widely available high bandwidth switched network service providing end-to-end digital connectivity over standard phone lines for simultaneous transmission of voice and data. There are two levels of service:
- Basic Rate Interface-ISDN (BRI-ISDN)--provides for digital transmission of two 64 kbps bearer channels and one 16 kbps data and signaling channel (2B+D).
- Primary Rate Interface-ISDN (PRI-ISDN)--provides for digital transmission of twenty-three (23) 64 kbps bearer channels and one (1) 64 kbps data and signaling channel (23 B+D).
- Integrated Services Digital Network User Part-- The part of SS7 that comprises the signaling functions necessary to provide voice and non-voice services in ISDN and pre-ISDN architectures.
Intelligent Network
A telecommunications network offering enhanced facilities such as free phone, premium rate information services, call distribution services (for example, according to the geographical origin of the call), alternate call billing (sometimes provided through the use of personal calling cards), and virtual private network services. The intelligence to support these facilities is provided through specialized network nodes and telecommunications switches.
IntelliLight Broadband Transport (IBT)
A SONET-based point-to-point service providing high bandwidth interfaces over shared SONET infrastructure facilities.
Intellilight Optical Transport Service
An Optical Networking Solution using Wavelength Division Multiplexing technologies WDM.
IntellLight Shared Dual Path
A Private Line service with dual paths transported over multiple shared, self-healing SONET rings.
IntelliLight Shared Single Path
A Private Line service, which is provided using a shared network SONET infrastructure.
IntelliMux Service
A service whereby customers can reconfigure a specific voice grade, DDS and/or individual channels within a High Capacity DS1 service connected at a digital cross-connect system.
Interconnection
As described in the Telecommunications Act of 1996 Interconnection refers to the connection of separate pieces of equipment or transmission facilities within, between or among networks. For example, Interconnection includes Collocation arrangements, entrance facilities, Mid-Span Fiber Meet arrangements, etc.
Interconnection Agreement
An agreement between Verizon and a Carrier that provides for interconnection, collocation, resale, network elements, and ancillary services between the parties. The Interconnection Agreement is entered into under the terms of Section 251 of the Telecommunications Act of 1996.
Interconnection Facility
The physical connection of equipment, transmission facilities, etc., within, between and among networks, for transmission and routing of exchange service and exchange access.
Interconnection Point
The physical point on the network where two parties interconnect. The interconnection point is the demarcation point between ownership of the transmission facility and the outside network.
Interexchange Carrier or Interexchange Common Carrier
A telecommunications service provider authorized by the FCC to provide interstate long distance communications services between LATAs, and authorized by the State to provide long distance communications services. An Interexchange Carrier provides, directly or indirectly, interLATA or intraLATA telephone toll services. May be an individual, partnership, association, joint-stock company, trust, governmental entity or corporation engaged for hire in interstate or foreign communication by wire or radio, between two or more exchanges. An Interexchange Carrier may be a customer of Verizon.
Interface
A connection between two systems or devices. In routing terminology, a network connection; also, the boundary between adjacent layers of the OSI reference model. In telephony, a shared boundary defined by common physical interconnection characteristics, signal characteristics and meanings of interchanged signals.
Interference
Unwanted electrical signals or noise causing degradation of reception on a communications circuit.
InterLATA Service
As defined in the Telecommunications Act of 1996, telecommunications between a point located in a Local Access and Transport Area (LATA) and a point located outside such area.
International Direct Distance Dialing
Automatic international long distance dialing capability.
International Regional Calling Plan
Verizon Long Distance plan designed for businesses that make most of their international calls to one country or region. Flat per-minute rates available. Learn more. See also Talk to the World Plan.
Internet
An international network of networks, originally started for military purposes, that connects millions of users instantaneously through commonly-used protocols such as TCP/IP, HTTP, FTP, Gopher, etc. The widely-used World Wide Web is available through the Internet.
Internet Access
The connection that allows you to get on the Internet through an Internet Service Provider (ISP), of your choice. The type of connection you choose is based on a number of different factors, including cost and the communications system you have.
Internet Address
Also called an IP (Internet Protocol) address; a 32-bit address assigned to hosts using TCP/IP. The address is written as four octets separated with periods (dotted decimal format) that are made up of a network section, an optional subnet section and a host section.
Internet Protocol
Part of the TCP/IP family of protocols that tracks the outgoing address of nodes, routes outgoing messages and recognizes incoming messages.
Internet Service Provider
A vendor that provides direct access to the Internet, and services such as email. The user accesses the ISP by dialing up through a personal computer and modem, or through a dedicated line. Also known as an Internet Access Provider (IAP).
Interoperability
The ability to operate software and exchange information in a large network made up of different kinds of LANs.
Interstate Telecommunications
Telecommunications that originate and terminate in different states, subject to oversight by the FCC and state regulatory commissions.
IntraLATA Service
According to the Telecommunications Act of 1996, Telecommunications services that originate and end within one Local Access and Transport Area (LATA).
Intrastate Communications
Telecommunications that originate and terminate in the same state, subject to oversight by a state regulatory commission as provided by the laws of the state involved.
Intrastate IntraLATA
Services between two points within the same LATA that are not used in connection with InterLATA channels.
IP Address
Internet Protocol address; a 32-bit address assigned to hosts using TCP/IP. The address is written as four octets separated with periods (dotted decimal format) that are made up of a network section, an optional subnet section and a host section. Also known as an Internet Address.
IP Port
A service element in the Internet Protocol Virtual Private Network (IP-VPN) tariff: a physical port on a router.
IP VPN
A connectionless, packet-based IP routing service that provides private connectivity between customer locations.
ISDN
See Integrated Services Digital Network.
ISDN BRI
Basic Rate Interface-ISDN (BRI-ISDN) provides for digital transmission of two 64 kbps bearer channels and one 16 kbps data and signaling channel (2B+D).
ISDN PRI
Primary Rate Interface-ISDN (PRI-ISDN) provides for digital transmission of twenty-three (23) 64 kbps bearer channels and one (1) 64 kbps data and signaling channel (23 B+D).
ISDN User Part (ISUP)
A part of the SS7 protocol that defines call setup messages and call takedown messages.
ISP
See Internet Service Provider.
