Recommendation ITU-T Y.4420 (07/2021) Framework of Internet of things based monitoring and management for lifts Summary History FOREWORD Table of Contents 1 Scope 2 References 3 Definitions 3.1 Terms define elsewhere 3.2 Terms defined in this Recommendation 4 Abbreviations and acronyms 5 Conventions 6 Overview of IoT based monitoring and management for lift 7 Architecture of IoT based monitoring and management for lift 7.1 General architecture of IoT gateway and application for lift 7.2 Architecture of IoT gateway for lift 7.3 Architecture of IoT application for lifts 8 Protocol and data model for IoT based lift monitoring and management 8.1 Protocol for lift monitoring and management 8.2 Data model for lift monitoring and management Appendix I Use cases of IoT based monitoring and management for lift I.1 Lift emergency notification I.2 Lift monitoring in smart building Bibliography <\pre>