4 Feature Guide
List of Abbreviations
A
AA Automated Attendant
APT Analog Proprietary Telephone
ARS Automatic Route Selection
B
BGM Background Music
C
CLI Calling Line Identification
COS Class of Service
CPC Calling Party Control
CS Cell Station
D
DIL Direct In Line
DISA Direct Inward System Access
DND Do Not Disturb
DPT Digital Proprietary Telephone
DSS Direct Station Selection
DTMF Dual Tone Multi-Frequency
E
EFA External Feature Access
F
FWD Call Forwarding
G
G-CO Group-CO
G-DN Group Directory Number
I
ICD Incoming Call Distribution
IRNA Intercept Routing—No Answer
L
L-CO Loop-CO
LCS Live Call Screening
O
OGM Outgoing Message
P
PIN Personal Identification Number
PS Portable Station
PT Proprietary Telephone
S
S-CO Single-CO
SLT Single Line Telephone
SMDR Station Message Detail Recording
T
TAFAS Trunk Answer from Any Station
TRG CO Line Group
TRS Toll Restriction
U
UCD Uniform Call Distribution
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