Capturing the phone network traffic

Last Updated : Apr 17, 2026 |
Prolog information
Metadata
Keywords:
You can capture the real-time network traffic of the phone using the phone web interface. You receive the network traffic data on the computer from where you launch the phone web interface. When you start the process of capturing the network traffic, the phone sends the traffic data to the browser, and after you end the process, the final .pcap file is created on your computer. You can also capture the network traffic when your phone is on an active Wi-Fi connection. The packet capture file has data only if there is active network traffic while you run the report.
You can use the phone network traffic data to debug the phone registration and call-related issues.
PREREQUISITE
Ensure your phone is on an active network connection.
  1. Log in to the web interface.
  2. In the navigation pane, click Debugging.
  3. Scroll to the Packet Capture section.
  4. Press Start.
    STEP RESULT:
    The packet capture file starts downloading in a location per your browser setting.
    The file name format is <device model><MAC address ><timestamp>.pcap
  5. Press Stop to end the packet capture.
    ADDITIONAL INFORMATION:
    While you are running the report, the packet capture also stops in the following scenarios:
    • If you log out of the phone web interface.
    • If the phone web interface session times out.
    • If you log in to the same phone web interface in another browser instance.
    We recommend using IPv4 for the Avaya J129 IP Phone for the seamless performance of this feature.