Panasonic KX-NCP500 Features Manual page 8

List of Abbreviations
TRG
Trunk Group
TRS/Barring
Toll Restriction/Call Barring
U
UCD
Uniform Call Distribution
V
VM
Voice Mail
VoIP
Voice over Internet Protocol
VPN
Virtual Private Network
VPS
Voice Processing System
X
XDP
EXtra Device Port
8 Feature Guide