ITU‐T's Technical Reports and Specifications 333 OBU On Board Unit OEM Original Equipment Manufacturing OLN Optical Line Terminal OLT Optical Line Termination ONUs Optical Network Units OSI Open Systems Interconnection PAN Personal Area Network PC‐LAN Personal Computer Local Area Network PHY Robust radio PM2.5 Particulate matter air pollution PON Passive optical network POTS Plain Old Telephone Service PSTN Public Switch Telephone Network PtP Point to point PUE Power Usage Effectiveness QoL Quality of Life QoS Quality of service QR Quick Response RF Radio Frequency RF‐ICs Radio Frequency‐Integrated Circuits RFID Radio Frequency Identification Devices RNC Radio Network Controller ROADM Remote Optical Add‐Drop Multiplexing ROI Return on investment RSP Retail service provider RSSI Receive Signal Strength Indicator RSU Road side unit SaaS Software as a Service SAP Service Access Protocol SCADA Supervisory Control and Data Management SDDC Software‐Defined Data Center SDH Synchronous Data Hierarchy SGTF Smart grid task force SMARTIE Secure and Smarter Cities Data Management