Redundancy Design Solutions in Industrial Routers and Cellular Communication Devices Table of Contents 1. Introduction: Why Do Cellular Communication Devices Need "Redundancy"? 2. Fundamental Concepts 2.1 What is Single Module Single SIM 2.2 What is Single Module Dual SIM (Dual SIM Single Module) 2.3 What is Dual Module (Dual Module / Dual Modem) 3. Detailed Working Principles of Single Module Dual SIM 3.1 SIM Card Switching Mechanism 3.2 Switching Latency Analysis 3.3 Techn

Table of Contents Introduction: Why We Must Re-examine M2M and IoT Today Concepts and Definitions: What is M2M? What is IoT? 2.1 What is M2M (Machine-to-Machine)? 2.2 What is IoT (Internet of Things)? 2.3 A One-Sentence Summary of Their Differences Historical Evolution: Technological Era Shift from M2M to IoT Technical Architecture Comparison: Point-to-Point vs. Cloud-Centric 4.1 M2M Architecture: Point-to-Point (P2P) System 4.2 IoT Architecture: Cloud-Centric Collaborative S

Table of Contents Overview and Manufacturing Objectives Raw Materials and Supply Chain Management 2.1 Key Raw Materials in Factory Production 2.2 Supply Chain Management Key Points for Factories PCB and Hardware Design Stage 3.1 Design Stage Outputs from Factory Design Teams 3.2 High-Frequency and RF Design Considerations in Factories 3.3 Power and Thermal Design for Robust Factory Output Component Procurement and Incoming Inspection (IQC) 4.1 Incoming Inspection Process in M