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Glossary:
Installation and Upgrades for G700 with S8300 or S8700
555-234-100 — Issue 3 — May 2003
345
LDS
Long distance service
Leave Word Calling (LWC)
A feature for internal messaging that records a caller’s name, extension number, and the time of the call for retrieval by
the called party.
LEC
See
local exchange carrier (LEC).
lightwave transceiver
Hardware that provides an interface to fiber-optic cable from port circuit packs and DS1 converter circuit packs.
Lightwave transceivers convert electrical signals to light signals, and light signals to electrical signals.
line
A transmission path between a communications system or a central office (CO) and a telephone or other terminal.
line appearance
See
appearance.
line buildout
A selectable output attenuation that is generally required of data terminal equipment (DTE) equipment because T1
circuits require the last span to lose 15 dB to 22.5 dB.
line gateway
An Avaya G700 Media Gateway without IP telephones.
line port
Hardware that provides the access point to a communications system for each circuit that is associated with a telephone or
a data terminal.
link
A transmitter-receiver channel that connects two systems.
link access procedure-D (LAPD)
A link-layer protocol on the ISDN-BRI data-link layer (Level 2) and the ISDN-PRI data-link layer (Level 2). LAPD
provides data transfer between two devices, and error and flow control on multiple logical links. LAPD is used for
signaling and low-speed packet data (X.25 and mode 3) on the signaling (D) channel, and mode 3 data communications
on a bearer (B) channel. Also called Link Level Protocol for the D-Channel.
LINL
Local indirect neighbor link
LIU
Lightwave integration unit
local access and transport area (LATA)
A geographic area within the US in which a local telephone company may offer local telecommunications services or
long distance telecommunications services.
local area network (LAN)
A networking arrangement that is designed for a limited geographical area. Generally, a LAN is limited in range to a
maximum of 6.2 miles, and provides high-speed carrier service with low error rates. Common configurations include
daisy chain, star (including circuit-switched), ring, and bus.
local exchange carrier (LEC)
A local telephone company.