Glossary, Acronyms, and Abbreviations - IIUSA

TSEC - telecommunications security
TSES - tactical signals exploitation system
TSG - test signal generator
TSGCEE - tri-service group on communications-electronics
equipment (NATO)
TSIG - trusted systems interoperability group
TSK - transmission security key
TSL - tactical satellite link
TSM - tax system modernization
TSM - trusted software methodology
TSM - trunk signaling message
TSO - time sharing option
TSO - telecommunications service order
TSOP - thin small-outline package
TSOP - tactical standing operating procedure
TSP - telecommunications service priority
TSP - PO TSP Program Office
TSP - (Time Space Processor) ASIC (Application Specific Integrated
Circuit) - Each SX module has four TSPs, each capable of
performing time-space-time switching on IC residing on the
switchboard. Facilitates bi-directional transmission of call data
between more than one TBus. The TSP has two major functions:
Time Slot Interchange, and PBus arbitration and control.
TSP - telecommunication service priority
TSPI - time space position information
TSR - telecommunications service request
TSR - terminate and stay resident
TSRD - Telecommunications Security Requirements Document
TSS - Telecommunications Standardization Sector
TSS - traffic service station
TSS - tactical switching system
TSSP - tactical satellite signal processor
TSSR - tropo-satellite support radio
TST - tactical satellite terminal
TSTS - transaction switching and transport service
TT - terminal timing
TT&C - telemetry, tracking & command
TTA - tactical terminal adapter
TTA - trusted transfer agent
TTA - tactical terminal adapter
TTAP - Trusted Technology Assessment Program (NSA-NIST)
TTCS - tactical terminal control system
TTD - temporary text delay
TTDS - theater tactical display system
TTL - (Transistor to Transistor Logic) - A digital circuit in which the
output is derived from two transistors. The term also refers
generically to digital connections in contrast with analog
connections.
TTL - time-to-live
TTMS - TROJAN Transportable Mini Switch
TTP - trusted third party (parties)
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TTS - text-to-speech
TTS - trouble ticketing system
TTY - teletype
TTY - teletypewriter
TU - timing unit
TU/FA - transition unit frame assembly
TUBA - transition unit box assembly
TUBA - TCP and UDP with bigger addresses
TUNA - transition unit nest assembly
TVI - television interference
TVP - topological vector profile
TVRS - tactical voice recognition system
TW/AA - tactical warning and attack assessment
TWA - two-way alternate
TWASI - 2-wire analog subscriber interface
TWG - telecommunications working group
Two Wire - A circuit path where only a single pair of wires is used. A
Hybrid is used to convert from two wire to Four Wire circuits. No
hybrid is perfect, and those used by the phone company can be
pretty bad. But the Telos TWO family is approaching perfection!
Two-way DID Trunk - An ISDN PRI (or T1) line equipped for direct
inward dialing. Most trunks are related to a given phone number,
either alone or as part of a hunt group. In the case of a "normal"
(ie analog) DID Trunk a group of phone numbers are associated
with that DID trunk (or group of trunks) and incoming calls include
the DID Number, so the PBX can route that call to the correct DID
Extension. This is exactly how ISDN PRI functions, with the DID
information coming in over the D Channel. There is a big
difference between a normal DID Trunk and a Two-way DID trunk
over ISDN PRI. For one thing, ISDN PRI is digital. More
importantly, you cannot dial out over a true DID trunk and you can
dial out over a PRI. See DID
TWS - two-way simultaneous
TWTA - traveling wave tube amplifier
TWX - teletypewriter exchange service
TX - transmit
TxClkIn - transmit clock in
TXCLKIN - transmit clock in
TxClkSrc - transmit clock source
TXD - transmitted data
TxIn - transmit in
TxRef - transmit reference
TXREF - transmit reference
U - unclassified
U
U - Interface - The interface between the ISDN BRI line and the NT1.
This can be considered the ISDN "phone jack" in the USA &
Canada and is frequently in the form of a RJ-11 or RJ-45 type
telephone jack.
U/C - upconverter
U/L - uplink