Here are the most common telecom acronyms starting with U from the world of computer networking.

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Acronym Description
U of E University of Excellence (T)
UA Universal Access
UA Universal Access
UA User Agent
UART Universal Asynchronous Receiver Transmitter
UAT User Acceptance Testing
ucb Unit Control Block
UCC Uniform Commercial Code
UCC Universal Conference Circuit(s)
UCD Uniform Call Distribution (or Distributor)
UDC Universal Data Converter
UDI Unrestricted Digital Information
UDLC Univac Data Link Control
UDP User Datagram Protocol
UDSI United Data Services, Inc.
U-DSL U Digital Subscriber Loop
UFD User File Directory
UHF Ultra-High Frequency
UIS Universal Information Services
UITP Universal Information Transport Plan
UL Underwriter’s Laboratories
ULC U Interface Line Card
ULP Upper Layer Protocol
ULSI Ultra Large Scale Integration
UMM Unplanned Material Movement (MFG)
UNDN Unassigned Directory Number
UNI User Network Interface
UNIVAC Universal Automatic Computer
UNS-R Unclassified National Security-Related
UPC Universal Product Code
UPS Uninterruptible Power System (or Supply)
USART Universal Synchronous/Asynchronous Receive Transmit
USASCII USA Standard Code for Information Interchange
USASI United States of America Standards Institute
USDA U.S. Department of Agriculture
USE Univac Scientific Exchange
USIA United States Information Agency
USIC User Support Information Center
USITA United States Independent Telephone Association
USO Universal Service Order
USOC Uniform Service Order Code
USP Usage Sensitive Pricing
USP Usage Surge Protector
USTA United States Telephone Association
UT Up Time
UTC Universal Time Coordinated
UTD Universal Tone Detector/Decoder
UTG Universal Tone Generator
UTI United Telecom, Inc.
UTP Unshielded Twisted Pair
UTS Univac Terminal System
UTSI United Telephone Systems, Inc.
UUA Univac Users Association
UVAC Universal Validated Account Code
UXS Unexpected Stop Dial

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