Experiment - 80 :- To demonstrate the functionality of Power over Ethernet (PoE) and measure its performance in powering a device over an Ethernet cable.

Aim :-  To demonstrate the functionality of Power over Ethernet (PoE) and Measure its performance in powering a device over an Ethernet cable.

Materials Needed

1. PoE Injector or PoE Switch: To provide power over the Ethernet cable.
2. PoE-Compatible Device: Such as a PoE IP camera, VoIP phone, or a PoE splitter.
3. Ethernet Cables: At least two Cat5e or Cat6 cables.
4. Multimeter: To measure voltage and current.
5. Network Switch (optional): If using a PoE injector.
6. Computer or Laptop: For monitoring and configuration (if necessary).
7. Power Source: For the PoE injector or switch.

Experiment Steps

Step 1: Setup the Equipment

Connect the PoE Injector/Switch:

• If using a PoE injector, connect it to a power source and plug it into your network.
• If using a PoE switch, ensure it is powered and connected to your network.

Connect the PoE Device:

• Use an Ethernet cable to connect the PoE output port of the injector/switch to the PoE-compatible device.

Connect the Data Input:

• If using a PoE injector, connect another Ethernet cable from the data input port of the injector to your network switch or router.

Step 2: Power On the Equipment

1. Turn on the PoE Injector/Switch: Ensure that the device is powered on and functioning.
2. Check the PoE Device: Verify that the PoE device powers on, indicating that it is receiving power through the Ethernet cable.

Step 3: Measure Voltage and Current

1. Use a Multimeter: Set the multimeter to measure DC voltage.
2. Measure Voltage: Connect the multimeter probes to the appropriate pins on the Ethernet cable (typically pins 1, 2 for data and 3, 6 for power in 802.3af/at standards).
3. Record the Voltage: Note the voltage reading.
4. Measure Current: If possible, measure the current flowing through the cable using the multimeter in series with the load.

Step 4: Test Data Transmission

1. Connect a Computer: If applicable, connect a computer to the same network to test data transmission.
2. Ping Test: Use the command prompt to ping the PoE device to ensure it is reachable over the network.
3. Monitor Performance: Check for any data loss or latency issues.

Step 5: Analyze Results

1. Evaluate Power Delivery: Compare the measured voltage and current against the specifications of the PoE standard being used (802.3af, 802.3at, or 802.3bt).
2. Assess Data Transmission: Analyze the results of the ping test and any other data transfer tests conducted.

Step 6: Document Findings

1. Record Observations: Document all measurements, observations, and any issues encountered during the experiment.
2. Conclude: Summarize the findings, discussing the effectiveness of PoE in powering devices and any limitations observed.

Safety Precautions

• Ensure all equipment is properly grounded.
• Avoid short-circuiting the Ethernet cables.
• Handle the multimeter with care to prevent electric shock.

Conclusion

This experiment will provide insights into how Power over Ethernet works, its efficiency, and its practical applications in networking environments. Adjust the experiment as needed based on available equipment and specific learning objectives.