Ethernet Network Telephone Cable Checker For RJ11/RJ45

The Generic Ethernet Network Telephone Cable Checker is an essential diagnostic tool for anyone working with network and telephone cabling. Whether you’re a professional network installer, IT technician, or DIY enthusiast, this compact tester enables quick, accurate verification of cable integrity and wiring correctness for both RJ45 Ethernet (Cat5/Cat5e/Cat6) and RJ11 telephone cables.

Comprehensive Cable Testing

Supporting both RJ45 (8-wire Ethernet) and RJ11 (4/6-wire telephone) connectors, the tester provides versatile functionality for modern network and legacy telephone systems. It tests all 8 conductors individually plus ground, enabling comprehensive diagnosis of:

• Open circuits: Broken or disconnected wires
• Short circuits: Wires touching/connected incorrectly
• Crossed pairs: Wires reversed or transposed
• Miswiring: Incorrect pin-to-pin mapping

Sequential LED Testing

The tester employs LED indicators that illuminate sequentially for each wire pair (1-2-3-4-5-6-7-8-G), providing immediate visual feedback on cable status. Correct wiring displays sequential green LEDs, while faults show no light, skipped lights, or out-of-sequence patterns — making diagnosis intuitive even for beginners.

Three Test Modes for Flexibility

• ON (Normal/Auto): Rapid automated scanning for quick cable verification
• S (Slow): Slower sequential scan for detailed observation and documentation
• M (Manual): Step-through testing for precise troubleshooting and training

Switch between modes based on your workflow — use auto for fast pre-install checks, slow for detailed diagnostics, or manual for educational demonstrations.

Streamlined Anti-Drop Design

The compact, lightweight construction features smooth lines and an anti-drop design that withstands the rigors of field installation work. The light-proof LED housing ensures clear indicator visibility in both bright outdoor and dim indoor environments — critical for on-site construction and troubleshooting scenarios.

Two-Piece Design for Long Cable Testing

Like professional cable testers, this unit splits into two pieces:

1. Main tester: LED indicators and test mode switch
2. Remote terminator: Plugs into far end of cable

This configuration enables testing of installed cables (both ends terminated) without disconnecting equipment — simply plug the main unit at one end and the remote terminator at the other to verify complete end-to-end cable integrity.

Practical Applications

• New installations: Verify correct termination before connecting equipment
• Troubleshooting: Quickly isolate faulty cables in existing networks
• Cable certification: Document cable quality for client acceptance
• Training: Demonstrate correct vs. incorrect wiring techniques
• Inventory testing: Check pre-made patch cables before deployment

Cost-Effective Network Maintenance

Rather than replacing cables blindly or using expensive professional test equipment, this affordable tester enables precise fault identification — saving time, money, and frustration. Diagnose problems in minutes instead of hours, and avoid replacing functional cables unnecessarily.

An indispensable tool for anyone installing, maintaining, or troubleshooting network and telephone cabling — professional reliability at an accessible price.

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Technical Specifications

Cable Compatibility

• RJ45: Ethernet (Cat5, Cat5e, Cat6 twisted-pair cables)
• RJ11: Telephone (4-wire, 6-wire telephone cables)

Testing Capabilities

• Wire Pairs Tested: 8 conductors + Ground (1, 2, 3, 4, 5, 6, 7, 8, G)
• Fault Detection:
• Open circuits (disconnected wires)
• Short circuits (wires touching)
• Crossed pairs (reversed wiring)
• Miswiring (incorrect pin assignments)

Test Modes

• ON (Normal/Auto): Automated sequential scanning
• S (Slow): Slower scan speed for detailed observation
• M (Manual): Manual step-through testing

Indicators

• Type: LED indicators (one per wire pair)
• Display: Sequential lighting pattern (1→2→3→4→5→6→7→8→G)
• Status: Light progression indicates correct wiring; gaps/skips indicate faults

Design

• Type: Two-piece (main tester + remote terminator)
• Construction: Plastic housing
• Features: Anti-drop, light-proof LED design
• Color: White + Green
• Portability: Compact, lightweight for field use

Power

• Type: Battery powered (typically 9V battery, not specified)
• Note: Battery likely not included (verify before purchase)

Physical Specifications

• Package Dimensions: 29.67 x 24.00 x 4.44cm
• Weight: 0.63kg (includes packaging)
• Unit Dimensions: Not specified (compact handheld size typical)

What’s Included

• 1x Cable Tester (main unit with LED display and mode switch)
• 1x Remote Terminator (typical for two-piece testers, verify if included)
• User manual (typical, verify if included)

Manufacturing

• Origin: China
• SKU: GE779IP1R7DCUNAFAMZ
• Brand: Generic (unbranded)

Certifications

• Not specified (basic cable tester, typically no certifications required)

Warranty

• 7-day return policy (via Jumia, verify with seller)

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Important Notes:

Limitations:

• Basic tester: Does not measure cable length, signal quality, or certify cables to industry standards (TIA/EIA)
• No advanced features: No wire mapping display, continuity beeper, or tone generator
• Manual interpretation: Requires understanding of LED patterns to diagnose faults
• Battery not included: Typically requires 9V battery (verify before purchase)
• Generic brand: Unbranded product with variable quality control

What This Tester Does:

✓ Verifies pin-to-pin continuity

✓ Identifies open, short, crossed, and miswired cables

✓ Tests RJ45 (Ethernet) and RJ11 (telephone) cables

✓ Provides visual LED feedback

What This Tester Does NOT Do:

✗ Measure cable length

✗ Test cable bandwidth/frequency (Cat5 vs Cat6 certification)

✗ Detect near-end crosstalk (NEXT), return loss, or signal quality

✗ Provide numerical readouts or data logging

✗ Test fiber optic, coaxial, or non-twisted-pair cables

Comparison to Professional Testers:

• vs Fluke/Klein Professional Testers: Lacks cable length measurement, bandwidth certification, tone generation, and data storage
• vs Advanced Cable Certifiers: Cannot certify Cat5e/Cat6/Cat6a to TIA/EIA standards
• Use Case: Suitable for basic continuity testing and simple troubleshooting, NOT for professional cable certification

Best For:

• Home network DIY installations
• Small office cable troubleshooting
• Student/training environments
• Budget-conscious technicians needing basic continuity testing
• Pre-install verification before connecting equipment

Not Suitable For:

• Professional cable certification requiring TIA/EIA compliance
• Testing cable quality for high-speed applications (10GbE, PoE++)
• Environments requiring detailed documentation and test reports
• Fiber optic or coaxial cable testing

Usage Tips:

1. Always test new cables before installation
2. Use slow mode (S) for detailed diagnostics
3. Label cables immediately after testing
4. Replace batteries regularly for consistent results
5. Store in dry environment to prevent moisture damage

This is a basic, functional cable tester ideal for verifying continuity and identifying gross wiring errors — not a replacement for professional-grade test equipment in commercial installations requiring certified performance specifications.