DEFINITY ECS Release 8.2
Administrator’s Guide
555-233-506 Issue 1
April 2000
Glossary and abbreviations
1640
kbyte
Kilobyte
kg Kilogram
L
LAN
Local area network
LAP-D
Link Access Procedure on the D-channel
LAPD
Link Access Procedure data
LATA
Local access and transport area
lb Pound
LBO
Line buildout
LDN
Listed directory number
LDS
Long-distance service
LEC
Local exchange carrier
LED
See light-emitting diode (LED).
light-emitting diode (LED)
A semiconductor device that produces light when voltage is applied. LEDs provide a visual indication of the
operational status of hardware components, the results of maintenance tests, the alarm status of circuit packs,
and the activation of telephone features.
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 vice versa.
lineA transmission path between a communications system or CO switching system and a voice terminal or other
terminal.
line appearance
See appearance.