Amprobe LAN-1 [3052401] LAN Cable Tester. The Amprobe LAN-1 Cable Tester is designed for testing opens, shorts and miswired cable installations. It is designed to work with various data cables and connectors. The LAN1 cable tester provides a quick go/no-go LED display of the wiring and connection of item under test. The LAN-1 includes two sets of LED lights for source and test indication. Remote termination module tests installed cable on wall plate or patch panels. You can either step through the test cable wiring one at a time or have the unit automatically pulse through the pin-outs and display the results.