1. Introduction and Overview
The NOYAFA NF-8506 is a versatile and multi-functional network cable tester designed for professionals and enthusiasts alike. It integrates various testing capabilities including IP scanning, POE testing, network cable continuity, cable length measurement, PING functionality, port flashing, and NCV (Non-Contact Voltage) detection. This tool is essential for the installation, maintenance, and troubleshooting of network infrastructure, phone lines, and Ethernet systems in both commercial and residential environments.

Figure 1.1: The NOYAFA NF-8506 main unit (left) with its LCD screen and control buttons, and the receiver unit (right) with indicator lights and a rotary switch. The image also highlights key features like POE Test, IP Scan, and Cable Length Measurement.
2. Product Features
- Network Cable Tester: Features IP scanning, POE test, anti-interference RJ11/RJ45 CAT5/CAT6 network cable testing, connectivity test, Ping network speed test, port flashing, sensitivity adjustment, and network cable length measurement.
- PING/IP Test Tool: Diagnoses and maintains local area networks (LANs) running TCP/IP. Authenticates connections, checks data integrity, measures round-trip time for network traffic load, and provides IP addresses.
- POE Tester: Efficiently identifies PoE devices, detects crossover mode (unknown/end-span/mid-span/8-core power supply), and polarity. Supports IEEE 802.3AF/IEEE 802.3AT standards. Automatically detects and switches between 10M/100M/1000M modes.
- Cable Length Measurement: Utilizes Time Domain Reflectometer (TDR) technology to accurately measure cable length within a range of 2.5m to 200m (8.2ft to 656ft). Scans and identifies cable fault distances.
- Ethernet Cable Speed Tester: Quickly evaluates network rate problems and conducts network rate tests. Performs PING tests from multiple locations to measure server and website responsiveness, ensuring cable integrity and continuity.
- Port Flashing: The indicator light on the connection port flashes to help accurately locate the cable. Displays port information including operating speed, duplex mode, and negotiation settings.
- NCV / LED Light: Non-Contact Voltage detection for safety and an integrated LED light for working in dark environments.
3. Setup
- Unpacking: Carefully remove the NF-8506 main unit, receiver, and all accessories from the packaging.
- Charging: Ensure the main unit is fully charged before first use. Connect the provided Type-C charging cable to the device and a suitable USB power adapter. The battery indicator on the screen will show charging status.
- Power On/Off: Press and hold the power button on the main unit to turn it on or off. The receiver unit typically powers on when its rotary switch is moved from the "OFF" position.
- Initial Inspection: Visually inspect both units and all cables for any signs of damage.
4. Operating Instructions
4.1 Cable Continuity Test (Cont)
This function checks for open circuits, short circuits, and cross-overs in network cables (RJ45) and telephone cables (RJ11).
- Connect one end of the cable to the "Flash/Length" RJ45 port on the main unit and the other end to the RJ45 port on the receiver unit. For RJ11, use the dedicated RJ11 port.
- Select "Cont" from the main menu using the navigation buttons and press "OK".
- The screen will display the wiring status, indicating if the cable is good, has a cross-over, short circuit, or open circuit.

Figure 4.1: The NF-8506 displaying results for cable continuity (Good, Cable Cross, Short Circuit, Cable Open) and demonstrating the port flash function on a network switch. The image also shows the cable length measurement interface.
4.2 Cable Length Measurement
This function measures the length of network cables and identifies the distance to a fault.
- Ensure the cable is disconnected from any active network devices.
- Connect one end of the cable to the "Flash/Length" RJ45 port on the main unit. The other end should be open (not connected to anything).
- Select "Length" from the main menu and press "OK".
- The device will display the measured length for each wire pair. If a fault is detected, it will show the distance to the fault.
- Note: For accurate length measurement, ensure the cable is not connected to any active network equipment or the receiver unit. Some users may experience initial difficulty with this function; ensure proper connection and an open end for the cable being tested.
4.3 POE Test
Tests Power over Ethernet (PoE) devices and power supply information.
- Connect the PoE cable to the dedicated "PoE" RJ45 port on the main unit.
- Select "PoE" from the main menu and press "OK".
- The tester will display information such as PoE standard (e.g., 802.3af/at), voltage, polarity, and power supply type (end-span/mid-span).

Figure 4.2: The NF-8506 displaying PoE test results, showing voltage on different pins and indicating support for 802.3af and 802.3at standards. The tester is connected to a 6-Port Gigabit Ethernet Switch with 4-Port PoE.
4.4 PING/IP Test
Performs PING tests to verify network connectivity and identifies IP addresses on the network.
- Connect the main unit to an active network port using the "Switch" RJ45 port.
- Select "Ping" or "IP Scan" from the main menu and press "OK".
- For PING test, enter the target IP address. The device will display statistics like successful pings, round-trip time, and packet loss.
- For IP Scan, the device will scan the network and list active IP addresses.

Figure 4.3: The NF-8506 displaying an IP scan result, showing a list of detected IP addresses. The image illustrates the device's use in identifying IP addresses of various network devices like security cameras and NVRs.

Figure 4.4: The NF-8506's PING/IP address tester interface, showing an IP scan in progress and its application in identifying devices connected to a PoE NVR, PoE Switch, and Router.
4.5 Port Flashing
Helps locate a specific port on a network switch or router by making its indicator light flash.
- Connect the main unit to the desired network port on a switch or router using the "Switch" RJ45 port.
- Select "Port Flash" from the main menu and press "OK".
- The corresponding port light on the connected network device will begin to flash, allowing for easy identification. The tester will also display port information like speed and duplex mode.
4.6 NCV (Non-Contact Voltage) and LED Light
The receiver unit features NCV for detecting live AC voltage without contact, and an integrated LED light for illumination.
- NCV: Move the rotary switch on the receiver to the "NCV" position. Bring the tip of the receiver close to an AC voltage source (e.g., live wire). The NCV indicator will light up and an audible alarm will sound if voltage is detected.
- LED Light: The LED light on the receiver can be activated to provide illumination in dark working conditions.
4.7 Network Rate Test
Evaluates the network speed and performance.
- Connect the main unit to an active network port using the "Switch" RJ45 port.
- Select "Rate Test" (or similar option, depending on firmware) from the menu.
- The device will attempt to detect and display the network speed (e.g., 10M/100M/1000M) and duplex mode (full/half duplex).

Figure 4.5: The NF-8506's interface showing various test modes including POE Test, Switch Test (for network rate), Ping Test, and Set IP. It also illustrates different cable categories and their typical bandwidths.
5. Maintenance
- Cleaning: Use a soft, dry cloth to clean the device. Do not use abrasive cleaners or solvents.
- Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures. Use the provided carrying case for protection.
- Battery Care: Recharge the battery regularly, even if the device is not in frequent use, to maintain battery health. Avoid fully discharging the battery for extended periods.
- Cable Care: Inspect test cables and adapters for wear or damage before each use. Replace damaged cables immediately.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | Low battery; power button not held long enough. | Charge the device fully. Press and hold the power button for 3-5 seconds. |
| Inaccurate cable length measurement. | Cable connected to active device; cable not fully open at far end; incorrect cable type selected. | Ensure the cable is disconnected from all network devices and the receiver. The far end of the cable must be open. Verify the cable type setting if applicable. |
| PING/IP test fails or shows "timed out". | Incorrect IP address; no network connectivity; device connected to wrong port; network firewall. | Verify the target IP address. Ensure the cable is connected to the "Switch" port. Check network connectivity and firewall settings. |
| POE test shows no power. | PoE not active on port; cable issue; device connected to wrong port. | Ensure the connected port on the switch/injector is PoE enabled. Check cable for damage. Connect to the dedicated "PoE" port on the tester. |
| Tone generator signal is delayed or weak. | Receiver sensitivity setting; environmental interference. | Adjust the sensitivity on the receiver unit. Move away from sources of electromagnetic interference. Note that some delay is inherent in the detection process. |
| Need to switch ports frequently for different tests. | This is by design for specific test functions. | Refer to the operating instructions for which port ("Flash/Length", "PoE", "Switch") to use for each test. The screen will often prompt you. |
7. Specifications
| Attribute | Detail |
|---|---|
| Brand | NOYAFA |
| Model Number | NF-8506 |
| Product Dimensions | 22.86 x 10.16 x 7.62 cm |
| Item Weight | 272.16 g (0.6 Pounds) |
| Power Source | Battery Powered |
| Measurement Type | Wire Tracer, Cable Tester (Continuity, Length, POE, PING, IP Scan, Port Flash) |
| Color | Grey |
| UPC | 786194234338 |
8. Warranty and Support
For warranty information, technical support, or service inquiries, please contact NOYAFA customer support directly. Refer to the product packaging or the official NOYAFA website for the most current contact details.





