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NF-8508 Network Tester

Practical and Affordable for the IT Professional

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Practical tools for IT professional

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  • Wire mapping & Continuity test: Check Cat5 & Cat6 Cables status.
  • Cable trace: Adjustable signal strength indicator helps find cables
  • Length test: Measure the length of CAT5/CAT5e/CAT6 cables
  • Switch Port flash: Sending signals through connected cables to flash ports
  • PoE test: Diagnose the PoE network switch ports
  • Optical Power meter: Measure optical power

Both devices have large internal batteries charged by TYPE-C connector

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Save time in problem solving

  • Visual Fault Locator: Quickly navigate Fiber break points with visible red lights.
  • RJ45 Head Test: Tell if RJ45 connectors are properly crimped
  • NCV: Non-contact voltage detector on Receiver improves safety and reduces chances of damaging devices

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NF-8508

  • Device functions are straight forward and easy to use.
  • Ergonomic design allow non-slip handheld devices. Reduces “drops” and workplace damage

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NF-8508

  • Optical and Wired network Tester
  • 4 in 1 Multi-function Tool
  • CAT5 CAT6 cable tester
  • 7 Wavelength Optical Power Meter
  • Visual Fault Locator

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A quick test for cables

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Split-pairs

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Continuity test limitations

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  • No information on cable performance
  • Cable speed capability
  • Impedance
  • Where the short or open exists on the cable or jacks

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VFL: 650nm Wavelength (Red Laser)

  • The VFL uses a 10mW visible red laser light, making it easy for technicians to visually locate faults in fiber optic cables, such as breaks, sharp bends, or poor connections.
  • The bright red light can be seen leaking from damaged areas or the end of the fiber, aiding quick identification.
  • The 10mW output power is suitable for tracing faults over short to medium distances (typically up to 5-10 km, depending on fiber quality).

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VFL: limitations

  • Inability to Measure Loss:
    • While the VFL makes breaks and bends visible, it does not quantify power loss. This requires an optical power meter or OTDR (Optical Time Domain Reflectometer).
  • Limited Use in Multi-Mode Fibers:
    • The 650nm wavelength is more effective with single-mode fibers, as the visible light may not travel as far in multi-mode fibers
  • Cannot Detect Micro bends:
    • While effective for sharp bends and breaks, it may not reveal subtle micro bends that affect performance.

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Limitations of Port flashing

Requires Managed Switches

    • Explanation: Port flashing typically relies on the tester interacting with the switch's management interface (e.g., via SNMP or proprietary protocols).
    • Impact: This feature will not work on unmanaged switches, which lack the ability to control port LEDs programmatically.

Limited to Direct Connections

    • Explanation: The feature identifies ports directly connected to the device being tested.
    • If the device is connected through an intermediate switch, patch panel, or other network equipment, the flashing might not accurately identify the port.
    • Impact: In environments with multiple layers of switches or patch panels, the port flashing feature may lead to confusion or require additional tracing.

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Limitations of Port flashing

VLAN or Trunked Port Limitations

  • Explanation: If the port is configured as a trunk port carrying multiple VLANs, or if it participates in link aggregation (LAG/LACP), the tester may not flash the correct or expected port LED.

Potential Interference with Network Operations

  • Explanation: Port flashing might send test packets or signals that could interfere with normal network traffic or device operation, particularly if the feature is not implemented carefully.
  • Impact: In production environments, frequent or improper use of this feature could temporarily affect network performance or stability.

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Limitations of Port flashing

  • Distance or Signal Degradation
    • Explanation: If the cabling is long or compromised (e.g., with high attenuation or noise), the tester may not be able to send a reliable signal to the switch to trigger port flashing.
    • Impact: In such cases, the tester might fail to identify the port.
  • Insufficient Labeling or Documentation
    • Explanation: While port flashing can identify the switch port, it doesn’t provide additional information about the connected device unless the network documentation is well-maintained.
    • Impact: IT professionals may still need to trace the cable physically or rely on network documentation to determine which specific device is connected.

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Limitations of Port flashing

VLAN or Trunked Port Limitations

    • Explanation: If the port is configured as a trunk port carrying multiple VLANs, or if it participates in link aggregation (LAG/LACP), the tester may not flash the correct or expected port LED.

Potential Interference with Network Operations

    • Explanation: Port flashing might send test packets or signals that could interfere with normal network traffic or device operation, particularly if the feature is not implemented carefully.
    • Impact: In production environments, frequent or improper use of this feature could temporarily affect network performance or stability.

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NF-8508

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