The global connectivity industry once again gathered in Barcelona for the annual Mobile World Congress 2026, one of the world’s most influential technology exhibitions. Held from March 2–5, 2026  at the Fira Gran Via venue in Barcelona, Spain, the event brought together leading telecom operators, technology providers, IoT innovators, and enterprise solution vendors from around the world. ( MWC Barcelona ) As the industry continues to evolve toward intelligent connectivity, th

Table of Contents Preface: Why Do Industrial Scenarios Need Voice Communication? Basic Concepts of VoIP and SIP 2.1 What is VoIP? 2.2 What is SIP? Role of Industrial Routers in VoIP/SIP Systems Typical Application Scenarios of VoIP/SIP on Industrial Routers 4.1 Industrial Site Voice Intercom 4.2 Unattended Site Remote Calling 4.3 Voice Alarm and Linkage Systems 4.4 Industrial Private Network/Industry Private Network Voice Communication Key Technical Support for VoIP/SIP by In

Table of Contents What is eSIM eSIM Development Background and Industry Trends 2.1 Limitations of Traditional SIM Cards 2.2 The Emergence of eSIM eSIM Working Principles and Technical Architecture 3.1 Core Components of eSIM 3.2 Workflow Overview Comparison Between eSIM and Traditional SIM Cards Main Application Scenarios of eSIM 5.1 Consumer Electronics 5.2 IoT and M2M Applications 5.3 Industrial Internet of Things (IIoT) 5.4 Connected Vehicles and Smart Transportation Core