Auerswald Compact 4000 PBX broken after Firmware Update

Today a PBX from Auerswald got broken after the latest Update, 8.4B – Build 000.
After the failed Update the PBX stuck with a red blinking status LED and no LAN connection.


  • Remove the cover
  • Press the “Reset” button
  • Press and hold the “Altern.” button until the status LED switch from fast flashing orange to slow flashing orange
  • Release the “Altern.” button
  • Check the network connection and reinstall the firmware update

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