Gigaset SL800 H PRO Instruction Manual page 46

Additional functions using the PC interface
Procedure in the event of an error
If the update procedure fails or the telephone no longer functions properly after the update,
repeat the update procedure:
End the Gigaset QuickSync program on the PC
telephone Remove the battery
Carry out the firmware update again as described above
If the update procedure fails more than once or it is no longer
possible to connect to the PC, carry out the Emergency Update:
End the Gigaset QuickSync program on the PC
USB data cable from the telephone
Press and hold keys
forefinger and middle finger
Release keys
Talk key will flash alternately
Carry out the firmware update as described above
Always save pictures and sounds uploaded onto the handset on the PC, as they are
deleted during an Emergency Update.
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Re-insert the battery
Remove the battery
and at the same time with the
Replace the battery
and . . . the Message key
Remove the USB data cable from the
Remove the
and the