Firmware downgrade for FVE-200D and 200D-T

Firmware downgrade is not recommended. Before downgrading, consult Fortinet Technical Support first.

Downgrading from 5.3.24 to 5.x.x release

Downgrading from 5.3.24 to 5.x.x release is not fully supported and may cause data loss. If you have to downgrade, follow these steps:

1. Back up the 5.3.24 configuration.
2. Install the older 5.x.x.
3. In the CLI, enter execute factoryreset to reset the FortiVoice unit to factory defaults. Note that you will lose all of the FortiVoice configurations by doing so.
4. Configure the device IP address and other network settings.
5. Reload the 5.x.x backup configuration saved before upgrading to 5.3.24.

Downgrading from 5.3.24 to 4.0.x/3.0.x/2.0.x release

Downgrading from 5.3.24 to 4.0.x/3.0.x/2.0.x release is not fully supported and may cause data loss. If you have to downgrade, follow these steps:

1. Back up the 5.3.24 configuration.
2. Install the older 4.0.x/3.0.x/2.0.x image.
3. In the CLI, enter execute factoryreset to reset the FortiVoice unit to factory defaults. Note that you will lose all of the FortiVoice configurations by doing so.
4. Configure the device IP address and other network settings.
5. Reload the 4.0.x/3.0.x/2.0.x backup configuration saved before upgrading to 5.3.24.