Wireshark Network Capture Guide for TRBOnet
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Before Starting Capture
Disable voice encryption on the transmitting side:
• For portable radio — disable encryption on the radio channel.
• Dispatcher — remove the "lock" from PTT.
• PTT over Cellular — disable encryption in the server.
• For portable radio — disable encryption on the radio channel.
• Dispatcher — remove the "lock" from PTT.
• PTT over Cellular — disable encryption in the server.
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 interfaces. |
| 3 | In the Capture filter field, specify a filter. |
Filter Examples:
Traffic only from IP 192.168.1.1:
host 192.168.1.1
Traffic from subnet 192.168.1.0/24:
net 192.168.1.0/24
Other filters: wiki.wireshark.org/CaptureFilters
| Step | Action |
|---|---|
| 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). |
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 | Restart the system through the console: Reset. |
This is preferable: you won't have to restart the server, which would disconnect dispatchers and affect other working radio systems.
| Step | Action |
|---|---|
| 5 | Reproduce the problem. |
| 6 | Stop recording (red square or Ctrl+E). |
Send us:
- IP addresses of sender and receiver
- TRBOnet logs