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DECT handsets Unified Support Tool
8AL90330ENADed01
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4.1.8 Upgrade process
When the firmware has been successfully transferred to a handset, then it reboots and starts applying
the new firmware. Do not unplug battery or USB during this step as this will result in a failed firmware
update and a non-working handset. If the 8262Ex, 8262 or 8242 firmware update fails, then UART
mode + USB-to -Jack adapter has to be used, since this can communicate with the hardware boot
loader inside the baseband processor or DECT handset.
Example of 3 parallel upgrades for 8242 / 8262
Example of upgrade for 8212 / 8232/ DECT Intercom
4.1.9 Upgrade completion
When a handset firmware update is done, then "Completed" is displayed both on the PC and the
handset. The handset can then be disconnected and it will reboot (for DECT Intercom, disconnect the
Intercom to the power supply and then reconnect it so that it restarts with the new firmware). A new
handset can be connected for upgrade.
8242 / 8262 / 8262Ex
8212 / 8232 / DECT Intercom