Yealink SIP-T48G Administrator's Manual page 784

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
The following figure shows a portion of a <mac>-sys.log (e.g., 0015659188f2-sys.log):
You can capture packet in two ways: capturing the packets via web user interface or
using the Ethernet software. You can analyze the packet captured for troubleshooting
purpose.
To capture packets via web user interface:
1. Click on Settings->Configuration.
2. Click Start to start capturing signal traffic.
3. Reproduce the issue to get stack traces.
4. Click Stop to stop capturing.
5. Click Export to open the file download window, and then save the file to your local
system.
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