334 ITU‐T's Technical Reports and Specifications SME Small and medium enterprises SMW Smart water management SNS Social Networking Site SONET Synchronous Optical Network Technologies SSB Sensor service bus SSC Smart Sustainable Cities STaaS Storage as a Service TA Timing Advance TMN Telecommunication Management Network TP Transport Profile UGROW Urban GROundWate UMTS Universal Mobile Telecommunications System U‐TDOA Uplink‐Time Difference of Arrival UWB Ultra WideBand VDSL Very high bit rate Digital Subscriber Line VoIP Voice other IP VPN Virtual Private Networks VPP Virtual Power Plant WAN Wide Area Network W‐CDMA Wideband ‐ Code Division Multiple Access WDM Wavelength Division Multiplexing WG Working Group WiFi Wireless Fidelity WiMAX Worldwide Interoperability for Microwave ACCess WLAN Wireless Local Area Network XDSL X Digital Subscriber Line XML Extensible Markup Language