DES or no DES? PTP450

I have received a batch of PTP450 modules that should all have DES but the software version on some of them says:


Instead of -DES.

Yet these still have a security tab.

Any ideas on this.

Thank you


Software Version will show None at the end if the Encryption Setting on the radio is selected as None under the Security tab.

As soon as we change it to DES you will see DES at the end.