Thank you all for the answers.
Actually the AP 76xx are disconnected because they could not make them work.
It seems that RFS7000 can not be updated beyond 5.8.5, is this correct?
Is there a signing compatible with all the hardware indicated?
Another question, what is the best way to recover access credentials to download the software?
The contact person is no longer dependent and is not informed about it.
Thanks again, you are professional, veloccissimi and kind.
Thank you