Restoring Firmware at the Touch of a Button
Requirements:
•Firmware update performed
Warning: Touching voltage-carrying conductors or phone connections can cause life-threatening electric shocks.•For some installation and maintenance work, it is necessary to open the PBX while it is in operation (qualified electrician only). Make sure that the PBX is never left unattended while it is running with an open casing.
•Only qualified electricians should perform installation work within an open housing or perform service tasks using the buttons inside the casing.
Warning: Power surges, which may occur during electrical storms, can cause life-threatening electric shocks, or damage or destroy the PBX.•Do not open the PBX during an electrical storm.
Note: The previous firmware will only be retained in the flash memory for four weeks. After four weeks, the previous firmware will be overwritten by the current firmware to prevent the restoration of obsolete data.1.Press the Reset button on the CPU module.
2.Within the space of two seconds, push the Software altern. button on the CPU module and hold it.
The Status LED (LED at the centre) starts to quickly blink in orange.
After a few seconds, the blinking of the Status starts to blink slowly.
3.Release the Software altern. button.
The Firmware is restored.