| \\ More than 3500 Telecom abbreviations maintained by Ioan (Nini) Indreias // 1 A B C D E F G H I J K L M N O P Q R S T U V W X Y All words | |
| UA | Unbalanced Asynchronous (HDLC) |
|---|---|
| UA | Unnumbered Acknowledgement (HDLC) |
| UA | User Agent |
| UAN | User Access Node |
| UARFCN | UTRA Absolute Radio Channel Frequency Number (GSM - UMTS) |
| UART | Universal Asynchronous Receiver Transmitter |
| UAS | Unavailable Seconds |
| UBR | Unspecified Bit Rate (ATM) |
| UCA | Utility Communications Architecture |
| UCAN | Utility Consumers Action Network |
| UCD | Uniform Call Distribution |
| UCD | User Centered Design |
| UCIC | Unequipped Circuit Identification Code |
| UCS | Universal Communications Standards |
| UDC | Universal Digital Channel |
| UDI | Unrestricted Digital Information (ISDN) |
| UDLC | Univac Data Link Control |
| UDLC | Universal Digital Loop Carrier |
| UDP | User Datagram Protocol |
| UDP | User Datagram Protocol (IETF) |
| UDT | Unitdata |
| UDTS | Unitdata Service |
| UE | User Equipment (GSM - UMTS) |
| UEL | Universal Event Loader |
| UHF | Ultra High Frequency |
| UI | Unit Interval |
| UI | Unnumbered Information (HDLC) |
| UI | User Interface |
| UID | Unit Identification |
| UISG | Utility Industry Standards Group |
| ULTRIX | DEC's version of UNIX |
| ULTS | Universal Lifeline Telephone Service |
| UM | Unified Messaging |
| UMB | Upper Memory Block |
| UMTS | Universal Mobile Telecommunications System |
| UMTS | Universal Mobile Telecommunications System (GSM - UMTS) |
| UN | Unbalanced Normal |
| UNC | Universal Naming Convention |
| UNI | User Network Interface |
| UNI | User-Network Interface (ATM, FR) |
| UNICODE | UNIversal trunk-out-of-service Code |
| UNMA | Unified Network Management Architecture |
| UP | Unumbered Poll |
| UPA | User Part Available |
| UPC | Usage Parameter Control |
| UPN | Universal Personal Number |
| UPS | Uninterruptible Power System/Supply |
| UPS | United Parcel Service |
| UPT | Universal Personal Telecommunications |
| UPT | User Part Test |
| UPU | User Part Unavailable |
| URI | Universal Resource Identifier |
| URJ | Unregistration Reject (RAS) |
| URL | Uniform Resource Locator |
| URL | Uniform/Universal Resource Locator |
| URN | Uniform Resource Name |
| URQ | Unregistration Request (RAS) |
| USAA | United Services Automobile Association |
| USART | Universal Synchronous Asynchronous Receiver Transmitter |
| USAT | Ultra Small Aperture Terminal |
| USB | Universal Serial Bus |
| USI | User System Interface |
| USIM | UMTS SIM (UMTS) |
| USIM | Universal Subscriber Identity Module (3G) |
| USO | Universal Service Obligation |
| USO | Universal Service Order |
| USOC | Universal Service Offering/Order Code |
| USOC | Universal Service Order(ing) Code |
| USP | Usage Sensitive Pricing |
| USR | User-to-User Information (SS7) |
| USS | Unstructured Suplementary Services (SS) |
| USSD | Unstructured Supplementary Service Data (GSM - UMTS) |
| USTA | United States Telecommunications Association |
| USTK | UMTS STK (UMTS) |
| USU | USSD Service Utility |
| UTAM | Unlicensed PCS Ad Hoc Committee for 2-GHz Microwave |
| UTC | Coordinated Universal Time |
| UTC | Unable to Comply Ack (EOC) |
| UTC | Unacknowledged (Unnumbered) Information Transfer Control |
| UTM | Universal Transaction Monitor |
| UTM | Universal Transverse Mercator |
| UTP | Unshielded Twisted Pair |
| UTP | Unshielded Twisted Pair (Physical Layer) |
| UTRA | Universal Terrestrial Radio Access |
| UTRAN | Universal Terrestrial Radio Access Network |
| UTS | Unbundled Tandem Switching |
| UUCP | UNIX-UNIX Copy |
| UUS | User-to-User Signaling |
| UVG | Universal Voice-grade Channel Unit |
| UWB | Ultra Wide Band |
| SMBZ - SaMBoZaur - test for propagation of define:
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