Network cable tester A-LAN NI021 — UTP/STP continuity tester with LCD, RJ-45 support, grey

The Alantec NI021 UTP/STP Cable Tester Grey is a compact tool for verifying the continuity and correct wiring of twisted-pair Ethernet cables. Designed for testing both UTP and STP cable types, the unit uses LED indicators to show pin-to-pin connections and identify common faults such as open circuits, short circuits, and miswires. Its straightforward controls and portable form factor make it suitable for on-site troubleshooting and routine cable verification.

Advantages

The tester provides quick visual feedback through LEDs, enabling fast identification of wiring issues without the need for complex setup. Its compact and lightweight construction supports easy transport and use in confined spaces. The device supports multiple cable types commonly used in network installations and presents results in a clear, easy-to-interpret format that helps reduce diagnostic time.

Suitable for

• Field network technicians performing on-site cable checks
• IT staff verifying new or repaired Ethernet cabling
• Home users and DIY enthusiasts installing or troubleshooting LAN cables

Key specifications

• Cable types supported: UTP and STP twisted-pair Ethernet cables
• Indicators: LED indication for pin mapping and fault detection
• Form factor: compact, handheld tester in grey housing
• User interface: simple push-button operation with visual LED results

How to use

Connect the main unit and remote unit to each end of the cable under test, then activate the tester using the device controls. Observe the LED indicators to determine whether each conductor is correctly routed and to detect open, short, or crossed connections. For multi-segment testing, move the remote unit to the next cable end as required. Follow basic safety practices by powering down connected equipment before testing if necessary.

Usage recommendations

Use the tester as part of a systematic cable verification process: test new installations after termination, verify repaired cables before returning equipment to service, and store the compact unit in a protective case to prevent damage. Avoid exposing the device to moisture and extreme temperatures to maintain reliable operation.