-.7. S
>-
_,,..
S co
SDN
Sic
SL?
SMDR
SNR
SRC
T
TAFAS
TG
TSW
-.
U
)
UCD
UNA
W
Single CO
Secondary Directory Number
Single Line Telephone
Circuit
Single Line Telephone
Station Message
Detail Recording
Saved Number Redial
Source
Trunk Answer From Any Station
Trunk Group
Time Sharing Switch
Uniform Call Distribution
Universal Night Answer
Warning Tone
18-2