LG LDP7004N User Manual page 54

Glossary
IPLDK
IP enabled, LG Digital Keysystem
BGM
Background Music. You may select a number of different music sources to play through your
handset.
MPB
Main Processor Board. The 'brains' of the phone system. MPB contains all system software
and controls all system functions.
CO
Central Office. American term now widely adopted in the telecommunications industry to
describe the local telephone exchange.
VMIB
Voice Mail Interface Board. Integral Voice Messaging application for the IPLDK telephone
system.
Flexible Button
This is a button that can be assigned as a Line, Feature, Speed Dial or Extension button.
7004N/D User Guide | Glossary 53