Glossary

U

UDI
Unrestricted digital information
UGC
User-generated content: online content created and published by users of digital video, photography and music – on social networking and file-sharing sites such as Youtube.com, Myspace and Wikipedia.
UI
Unit interface
UM
Unified messaging: integration of email, voice mail and fax at the desktop.
UMA
Unlicensed mobile access
UMTS
Universal Mobile Telecommunications System: WCDMA-based third-generation (see 3G) mobile network technology.
Unbundling
Access provided by local exchange carriers so that other service providers can buy or lease portions of their network elements – ie an unbundled exchange.
UNE
Unbundled network element: telecoms equipment that is “unbundled” from traditional end-to-end services to allow other local exchange carriers to use components of a network at incremental cost.
UPS
Uninterruptible power supply.