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4 Feature Guide
List of Abbreviations
A
AA Automated Attendant
APT Analogue Proprietary Telephone
ARS Automatic Route Selection
B
BGM Background Music
BSS Busy Station Signalling
BV Built-in Voice Message
C
COS Class of Service
CPC Calling Party Control
D
DIL Direct In Line
DISA Direct Inward System Access
DND Do Not Disturb
DRD Distinctive Ring Detection
DSS Direct Station Selection
DTMF Dual Tone Multi-Frequency
E
EFA External Feature Access
F
FWD Call Forwarding
G
G-CO Group-CO
I
IRNA Intercept Routing—No Answer
L
LCS Live Call Screening
LED Light Emitting Diode
O
O-CO Other-CO
OGM Outgoing Message
P
PF Programmable Feature
PSTN Public Switched Telephone Network
PT Proprietary Telephone
S
S-CO Single-CO
SLT Single Line Telephone
SMDR Station Message Detail Recording
SMS Short Message Service
T
TAM Telephone Answering Machine
TRS Toll Restriction
U
UCD Uniform Call Distribution
V
VM Voice Mail
VPS Voice Processing System