Yealink SIP-T21 E2 User Manual page 173

5. Click Export to open file download window, and then save diagnostic files to your
local system.
Note
If the issue cannot be reproduced, just directly click Export to export all diagnostic
files.
How to reboot the phone?
To reboot the phone via web user interface:
1. Click on Settings->Upgrade.
2. Click Reboot to reboot the IP phone.
Note
Any reboot of the IP phone may take a few minutes.
Troubleshooting
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