What data to enter from a megaphone on zadarma.com?

Question

SIP

Good day to all. I'm trying to connect my cell phone (megaphone) to a cloud-based PBX for nothing. I can't find the correct connection details anywhere. On the hotline, of course, they don’t know anything, they send me to the office. And the office is 200 km away from me. Information is different everywhere on the Internet. What I don’t find, I enter: there is no connection. Help, please.

Answer 1

Thank you very much, I found this data yesterday. Then a new problem arose, I will give screenshots of communication with support, the solution has not yet been found. Thank you for your help.

Answer 2

throw this idea
it won’t work normally
SBC of the megaphone will block when requests from one IP are exceeded (which is what happens with intermediaries)