3
After upgrade, unplug the USB cable from the handset. To upgrade another handset,
connect the handset to the computer and repeat steps 3-5.
The handset performs registration to the base station automatically after reboot. If auto
registration doesn’t work for any reason, you need to re-register the handset to the base
station manually. For more information, refer to
Yealink W52P User Guide
.
When the handset is idle, you can verify its firmware version by pressing
OK->Status->System Status->More->Handset.
Upgrade will take a few minutes. Do not unplug the USB cable during the upgrade
process.
If the target firmware version is the same as the current firmware version, upgrade
cannot be performed directly.
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