Table of Contents
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T (Continued)
TELSET
Telephone Set
TM
Test Mode
TP
Test Pattern
TR
Terminal Ready
TST
Test
TTD
Temporary Text Delay
TTL
Transistor-to-Transistor Logic
TX
Transmit
U
U
Reference Designator
UART
Universal Asynchronous Receiver / Transmitter
USOC
Universal Service Ordering Code
V
V.
CCITT Code Designation
V.24
List of definitions for interchange circuits between data terminal equipment and data
circuit-terminating equipment (and provisional amendments, May 1977)
Vac
Volts Alternating Current
VAC
Value Added Carrier
VAL
Valid
Vdc
Volts Direct Current
W
WATS
Wide Area Telecommunications Access Method (AT&T)
X
X.
CCITT Recommendation Designation
XMIT
Transmit
XOFF
Transmitter Off
XON
Transmitter On
XTC
External Transmit Clock
Abbreviations and Acronyms
UTA220/UTA220k
G-9
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