Have we asked you to send a capture or call trace?
Sometimes, we need a bit more detail to help pinpoint a problem. In those cases, we may ask you to send us a trace or capture of the phone call data at your side.
This helps us see what’s happening between your devices and our servers.
Where to learn more
You can find a helpful guide from the creators of Wireshark here:
Wireshark VoIP Calls Guide
For a more detailed explanation, try this article:
Linux Journal – Network Capture
Quick steps to capture SIP traffic using Wireshark
To check what’s really happening, it’s useful to see the SIP messages being exchanged. SIP (Session Initiation Protocol) is used to set up, manage, and end VoIP calls.
You might want to:
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See if SIP traffic is reaching our servers
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Check if a firewall is blocking your connection
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View the details of your SIP messages, like INVITEs or REGISTER
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See how your devices are trying to connect to Voyced
How to create a SIP capture:
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Download and install Wireshark
Get it free from www.wireshark.org -
Choose the right network interface
Open Wireshark, go toCapture > Interfaces, then select the one your device is using (usually Wi-Fi or Ethernet) -
Start capturing
Click the start button to begin. Traffic will now appear. -
Make a test call or recreate the issue
For example, register your phone with Voyced or try an outbound call. -
Stop and save the capture
Once done, stop the capture and save it from theFilemenu.
Important: Save an unfiltered capture
When saving:
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In the "Save" window, look for the Packet Range section
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Choose Captured and All packets
This gives us everything, including possible issues outside SIP, like:
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Codec or port errors
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DNS or HTTP failures
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Other traffic interfering with the call
Need help with this?
Let us know, we’re happy to guide you through it.
Last updated: 01/04/2025
© Voyced
All information provided is copyrighted and purely informative in nature. It is maintained by Voyced with the greatest of care using reliable sources only.
Given the fast evolution of the telecom sector, Voyced does not offer any guarantee about the accuracy and completeness of the information offered.
We explicitly do not give anyone permission to use this information in any other way than to inform themselves about what (legal) requirements there may be and they need to comply with when registering Services and/or DIDs with Voyced.
