How can p-asserted identity be implemented when forwarding a call to the world?

Question

Asterisk

Call of subscriber X from the world to sip trunk --> Dial (SIP/subscriber A).
Accordingly, the subscriber A will determine the trunk number. The provider does not pass identity. Tell me the solution, how can I force to send subscriber A the number of the caller X?
upd. Subscribers X and A are PSTN subscribers, that is, not asterisk peers.

Answer 1

And why did you decide that if the provider does not skip someone else's from, then he skips pai/ppi/rpi ?