Thank you @lgaetz and @jfinstrom for your answer.
Right now I followed this guide: Sangoma Documentation but I’m obtaining at the end of the procedure the error:
“Reading /etc/asterisk/asterisk.conf…Error! Unable to read /etc/asterisk/asterisk.conf or it was missing a directories section”.
This happen after the last command “./install -n” and “asterisk.conf” file exists. I saw that there are other users with same issue, so I will follow other threads, like this: Manual Install FreePBX14，Unable to read /etc/asterisk/asterisk.conf - #7 by tm1000
Thank you so much