PoE Cable Tester with Power Negotiation and Conduction Checks

The patent combines multiple inspection functions (conduction status test, resistance measurement, voltage measurement, current measurement) into a single integrated cable tester device. The processing unit coordinates multiple measurement units and test circuits that share common hardware resources, allowing the device to perform diverse inspections without proportionally increasing complexity. This merging approach resolves the contradiction by consolidating functions that would otherwise require separate devices.

The cable tester is designed as a universal device capable of testing both data cables and power cables through its multiple ports (PSE port and PD port). The device can adaptively switch between different test modes (conduction test, resistance measurement, power supply testing) based on the connection type, providing multi-functionality without requiring separate specialized testers for each function.

The cable tester automatically executes power supply determination algorithms and negotiates power parameters with PoE devices using standardized protocols. The processing unit autonomously performs power capability detection, voltage measurement, current measurement, and conduction testing without requiring manual configuration or interpretation by the operator. This self-service capability ensures reliable inspection results while maintaining ease of operation, as the device handles complex protocols automatically.

The cable tester implements feedback mechanisms by continuously monitoring voltage and current measurements during power supply testing. The processing unit compares measured values against expected ranges and provides real-time feedback on power delivery status. This automated feedback loop ensures reliable inspection results by objectively evaluating PoE power supply performance without requiring manual assessment by the operator.