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Wireshark Capture

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If you are experiencing voice quality issues and need TRBOnet Support to analyze network traffic, voice encryption must be temporarily disabled on the transmitting side:
For portable radios, disable encryption on the radio channel.
For dispatchers, click the lock icon on the PTT box.
For PTT-over-Cellular users, disable encryption in the server settings before capturing traffic.

Installation

1. Download Wireshark: wireshark.org/download.
2. During installation, enable the Npcap component — it is required for packet capture.

Case 1: Issue is constantly reproducible

Example: poor voice quality between TRBOnet and Radio System

Step Action
1 Launch Wireshark.
2 Select all network interfaces: Capture → Options (or Ctrl+K).
3 Click Start.
4 Reproduce the problem (make a test call).
5 Stop recording: red square or Ctrl+E.
6 Save the file (File → Save or Ctrl+S).
7 Archive the log (ZIP).

Send us:

  • Collected logs in archive
  • IP addresses of sender and receiver
  • TRBOnet logs
  • Audio recording of the problematic call so we can correlate it with network traffic

Case 2: Issue is sporadic

Example: Intermittent Poor Voice Quality Between TRBOnet and Radio System (during peak hours)

Step Action
1 Launch Wireshark.
2 Select the interface connected to the radio system: Capture → Options (or Ctrl+K).
3 In the Capture filter field, specify a filter.
4 In the Output section:
  • Specify the path for files
  • Enable Use multiple files
  • Configure segmentation: 50 MB
5 Click Start.
6 Wait for the problem to manifest.
7 Stop recording: red square or Ctrl+E.
8 Archive the log (ZIP).
Filter Examples:
Traffic only from IP 192.168.1.1:
Traffic from subnet 192.168.1.0/24:
Other filters: wiki.wireshark.org/CaptureFilters

Send us:

  • IP addresses of sender and receiver
  • TRBOnet logs
  • Audio recording of the problematic call so we can correlate it with network traffic

Case 3: System availability issues

Step Action
1 Launch Wireshark.
2 Select all network interfaces: Capture → Options (or Ctrl+K).
3 Click Start.
4 Launch the console with administrator privileges. In the bottom-left corner, among the system icons, select the desired system and click Reset → OK
This is preferable, as it does not restart the server and does not disrupt connections with dispatchers.
5 Reproduce the problem.
6 Stop recording: red square or Ctrl+E.

Send us:

  • IP addresses of sender and receiver
  • TRBOnet logs

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