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Recover from Unsuccessful Firmware Update
If the downloaded firmware is corrupted, the firmware upgrade
will be failed, and maybe the IP Phone will become malfunction,
too. If this happens, please follow the following instructions to
restore the IP Phone to normal state.
1. Reboot the IP Phone by instructions given in chapter 3-7. If it
doesn’t work, please disconnect the power cord from IP Phone,
then reconnect it after 10 seconds.
2. You should see ‘Loading’ message displayed on the IP
Phone, please be patient, and both the ‘headset’ and ‘mute’ key
will illuminate for 2 seconds. Please press ‘*’ key twice now, and
the firmware of IP Phone will be recovered.
If the instruction given above does not solve the problem,
please contact your dealer, or <service provider’s name>.