Table of Contents Introduction: Why Industrial Routers Must Endure Extreme Challenges Differences Between Industrial and Commercial Routers Overall Framework of Reliability Testing High and Low Temperature Testing: Verifying Stability Under Temperature Cycling 4.1 Testing Purpose 4.2 Testing Conditions 4.3 Testing Process 4.4 Judgment Criteria Vibration and Shock Testing: Verifying Structural Strength and Connection Reliability 5.1 Testing Purpose 5.2 Vibration Testing Condit