Black Box TS580A-R4 network cable tester Grey, Yellow purchased inexpensively from Mercateo

Verify that cables and LAN hardware perform at their advertised speeds.
- High-speed TDR provides nanosecond-accurate results.
- Locates opens, shorts, and splits, and pinpoints the exact distance to the fault or split.
- Stores up to 250 test results you can download to your PC via the USB port.
- Includes a toner/probe to locate wires in crowded wiring closets.

Further Details
- Check your network cabling and devices to ensure they work at the speeds promised by their manufacturers!
- Tests 10-, 100-, and 1000-Mbps devices for data signal levels.
- Enables you to test in-line between two devices to determine the autonegotiated speed.
- Sophisticated algorithm converts test results into easy-to-read graphs that clearly show the cable's speed capability (CAT3/5/5e/6).

Ideal for IT managers and technicians responsible for cabling and network hardware, the CAT5/5e/6 LAN Performance Verifier enables you to quickly spot slow cables, bad connectors, incorrect wiring, improper lengths, and low signal levels from hubs, switches, PCs, and other LAN hardware.

You can also decode your network devices' capabilities and signal levels, and even place the tester in-line between any two devices to determine the negotiated speed. Or perform single-side tests without powering down devices or unplugging cables.

Transfer the test results from up to 250 stored tests to your PC's Excel® spreadsheet via the USB port.