UC120 ring group

Hye
i have a new UC120 with firmware 3.8.1-20190612

but in ring group is not possible a ring strategy (but i see this option on french tutoriel on youtube )

and i want for un extension after un ring of 15 second go to the voicemail

thank you

hi,

you can contact me on skype, i will send you the new firmware to test

skype id : chunlei.yi