Instructions for setting up PBX telephony

I liked the interface and the great functionality of the program. But after setting up Asterisk, there are difficulties in setting up this program.
Maybe there are general instructions for setting up the program before the first call?
and I don’t see that something is listening to ports 5060 and RTS
Thank you

There are no PBX features in yeti-switch.
Guideline on Quick start of Yeti — Yeti documentation there is quick start guide, how to configure routing.

Could as ask more specific questions - what you want to achieve, what you tried, what error/issue you have - with details and error messages.