Lucent Technologies DEFINITY EXTENDER 1100 - Manual (Page 81)

Glossary
Issue 1 June 1998 GL-3
L
LED
Light-emitting diode. A semiconductor diode which emits light when a
current is passed through it, indicating that the power is on.
O
On-premise Lines
Communication lines (usually twisted-pair) that are used to connect the
DEFINITY ECS to the DEFINITY ECS telephone.
P
PBX
Private Branch Exchange.