PTP 450 series downgrade issue from 20.x to 16.x via CNUT

Summary:

This article will help you with troubleshooting an issue with downgrading the software version on PTP 450 product line radios from software version 20.x to 16.x via CNUT.

Product:

All PTP 450 product line radios only.

Symptoms:

Error that will appear in CNUT: “Message: Invalid File Image”

Solution:

In release 20.x onward, there is a flag called, BHS Tx Power Control, if it is enabled, radio cannot be downgraded to lower loads.

Therefore we must disable this flag under the Slave → Configuration → Radio → BHS Tx Power Control → Disabled as shown in the screenshot below:

After disabling this option, try downgrading the software version to 16.x version.

Note: This is only applicable to PTP 450 radios.