UGREEN Network Cable Tester (LY) NW167 – RJ45 & RJ11 LAN Cable Diagnostic Tool
The UGREEN network cable tester RJ45 is a handheld diagnostic device that verifies the integrity of Ethernet and telephone cables before or after installation — identifying faults that would otherwise cause intermittent connectivity, slow speeds, or complete connection failure. It tests RJ45 LAN cables from Cat 5 through Cat 7 and RJ11 telephone cables, covering the full range of twisted-pair cabling found in home, office, and light commercial network environments. Additionally, the split main-and-remote-unit design allows a single technician to test a cable end-to-end without an assistant.
Technical Specifications
Device
| Attribute | Detail |
|---|---|
| Model | NW167 |
| Part Number | 10950 |
| Type | Network and telephone cable tester |
| Dimensions | 200 × 150 × 30 mm |
| Weight | 200 g |
| Power Supply | 9V DC battery (not included) |
| Colour | Black |
| Warranty | 1 year limited |
Ports and Connectivity
| Attribute | Detail |
|---|---|
| Input Ports | RJ45 (8P8C) × 1, RJ12 (6P6C) × 1 |
| Output Ports | RJ45 (8P8C) × 1, RJ12 (6P6C) × 1 |
| Units Included | Main unit × 1, remote unit × 1 |
Supported Cable Types
| Cable Type | Connector |
|---|---|
| Ethernet Cat 5 | RJ45 8P |
| Ethernet Cat 5e | RJ45 8P |
| Ethernet Cat 6 | RJ45 8P |
| Ethernet Cat 7 | RJ45 8P |
| Telephone cable | RJ11 6P |
| Telephone cable (shielded/unshielded) | RJ12 6P6C |
Test Functions
| Test | Description |
|---|---|
| Open circuit | Detects broken or disconnected wire pairs |
| Short circuit | Identifies unintended contact between conductors |
| Crossover detection | Flags crossed wiring pairs |
| DC line detection | Confirms DC signal presence |
| Anode/cathode detection | Verifies correct polarity |
| Ring signal detection | Tests telephone ring signal continuity |
| Miswire detection | Identifies incorrect pin-to-pin connections |
Use Cases and Applications
Cable Verification Before Device Connection
Plugging a faulty cable into a router, switch, or NAS device risks prolonged troubleshooting as the fault presents as a device or configuration problem rather than a physical layer issue. Testing each cable with the NW167 before installation confirms continuity and correct wiring sequence upfront — saving the diagnostic time spent ruling out software or hardware causes when the fault is simply a crimping error or damaged conductor.
Post-Installation Testing of Structured Cabling
Network installers running cables through walls, ceilings, and conduit need to verify each run before sealing access points or closing junction boxes. The remote unit attaches to the far wall socket while the technician operates the main unit at the patch panel end, confirming end-to-end continuity without requiring a second person at the remote location.
Telephone Line Maintenance
The NW167 tests RJ11 telephone cables for DC line presence, ring signal continuity, and polarity — diagnostics relevant to VOIP installations, traditional PSTN lines, and DSL connections where wiring faults degrade call quality or prevent dial tone. This makes it useful alongside the VOIP handsets and PBX hardware already in the catalogue.
Field Service and IT Support
IT support technicians diagnosing intermittent LAN connectivity or network drops can quickly rule out cable faults at the physical layer using the NW167, rather than spending time testing switch ports, drivers, and configuration settings. A cable test takes under one minute and definitively confirms or eliminates the physical medium as the source of a problem.
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