Northern UTA220/UTA220k manual Telset

Abbreviations and Acronyms

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

UTA220/UTA220k G-9