SDN
Directory Number
SDY
AT&T Line Study
SEC
Security Code
SERVORD
Service Order
SHU
Stop Hunt
SLQLG
Single Line Queueing
SLU
Subscriber Line Usage
SMDI
Simplified Messages
SOR
Station Origination Restrictions
SPB
Special Billing Codes
SSAC
Station-Specification Authorization Codes
SUPR
Supervisor Feature
TLS
Terminating Line Select
TN
Terminal Number
TRKDISP
Trunk Member Display
TWC
3-Way Calling
MSL-100 M3900 Meridian Digital Telephones Reference Guide MSL15
List of terms A-9