Yealink SIP-T22 - Manual (Page 136)

User Guide SIP-T22P/SIP-T22 IP Phone
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How to reboot the phone?
To reboot the phone via web user interface:
1. Click on Settings->Upgrade.
2. Click Reboot to reboot the phone.
Note
How to export PCAP trace?
We may need you to provide a PCAP trace to help analyze your problem.
To export a PCAP trace via web user interface:
1. Click on Settings->Configuration.
2. Click Start to begin recording signal traffic.
3. Recreate the error to be documented in the trace.
4. Click Stop to end recording.
Any reboot of the phone may take a few minutes.