Downgrade Mitel 622d to use it with older A300 PBX

[vjaco]

Hi,

I need to downgrade a 622 dect phone to get back the original firmware.
Today the versions inside the phone are 7.0.SP8 & 7.0.SP10 (Bluetooth 3.2.1)

The older "none GAP" version is not available from the ***76# Downl. / Switch to ... menu.

Any tip how to downgrade the firmware and where to download the tool?

Regards
Verner

[NilsG]

did a guide in a new topic. "Downgrade Mitel 622 / 612"