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Acronyms and Abbreviations in Telecommunications - InterConnect ...

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138 <strong>Acronyms</strong> <strong>and</strong> <strong>Abbreviations</strong> <strong>in</strong> <strong>Telecommunications</strong><br />

U<br />

U/L Upl<strong>in</strong>k<br />

UA Unbalanced Asynchronous (HDLC)<br />

UA Universal Access<br />

UA Unnumbered Acknowledgement (HDLC)<br />

UA User Agent<br />

UAN User Access Node<br />

UART Universal Asynchronous Receiver Transmitter<br />

UAS Unavailable Seconds<br />

UAWG Universal ADSL Work<strong>in</strong>g Group<br />

UAX Unit Automatic Exchange<br />

UBR Unspecified Bit Rate (ATM)<br />

UC Unified Communications<br />

UCA Utility Communications Architecture<br />

UCC Ug<strong>and</strong>a Communications Commission<br />

UCD Uniform Call Distribution<br />

UCM Universal Call Model<br />

UCP Universal Computer Protocol<br />

UCS Universal Communications St<strong>and</strong>ards<br />

UCSP Unified Communications Service Provider<br />

UDI Unrestricted Digital Information (ISDN)<br />

UDLP UniDirectional L<strong>in</strong>k Protocol<br />

UDP User Datagram Protocol<br />

UDP User Datagram Protocol<br />

UDSL Unidirectional HDSL

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