Starts with a voltage check to protect the tester, then scans each twisted pair automatically. Each pair LED reads on, off or flashing — good pair, open, or bad pair.
Run it the moment one end is terminated. You learn which end carries the split pair, then attach a remote and go straight to a full test once the far end is done.
Isolates and diagnoses a single specific pair when the full scan has narrowed the problem down.
Sends a high or low tone on an individual pin, a pair, or all pins simultaneously to locate a wire break or trace a run with a probe.
The E models add a hub blink mode that identifies an active hub, switch or router port and verifies whether a particular port or jack is carrying live Ethernet service. A link LED shows whether the drop is on an active network, so an unknown RJ45 outlet can be located and identified quickly.
For coaxial cable with F connectors, use RJ45-to-F adapters with the tester and remotes.