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VS 2001
Technical Handbook
List of acronyms
P/N: 779-0373/02
Revision 02
Marconi Proprietary information
Page xxv
TERM OR
ABBREVIATION
MEANING
TIA
Telecommunication Industry Association
TIU
TETRA Interface Unit
TMN
Telecommunications Management Network
TMO
Trunked Mode Operation
TMV-SAP
Tetra MAC virtual SAP
TRX
Transmitter/Receiver
TSI
TETRA Subscriber Identity
TSU
TETRA Switching Unit
TTL
Transistor Transistor Logic
TU
Typical Urban
TX
Transmitter
UART
Universal Asynchronous Receiver Transmitter
UDP
User Datagram Protocol
UPS
Un-interrupted Power Supply
V+D
Voice plus Data
VAD
Voice Activity Detection
VASSI
Visitor ASSI
VATSI
Visitor ATSI
VC
Virtual Call
VGA
Video Graphics Array
VGSS
Visitor GSSI
VGTSI
Visitor GTSI
VHDC
Very High Density Connector
VLR
Visitors Location Register
VMR
Vehicle Mounted Radio
VP
Voice Processing
VR
Vehicle Radio
VSSI
Visitor Short Subscriber Identity
VSWR
Voltage Standing Wave Ratio
WAN
Wide Area Network
WDS
WAN Dispatcher Station (Marconi terminology) for DC
WDT
Watch Dog Timer
WFQ
Weighted Fair Queuing
WPS
Working Profile Subset – a collection of group identities stored in
the Mobile Station (MS-DB)
WR
Write
wrt
with respect to