While working on a new Asterisk 16.28.0 setup, I’m observing Asterisk the following.
Alice is calling Bob over the PSTN.
Alice’s phone, connected though PJSIP, has the following settings:
When Asterisk sends a final 200 OK back to Alice’s phone, it includes a P-Asserted-Identity field valued to something like <sip: firstname.lastname@example.org>.
This “s” string is then displayed on Alice’s phone screen.
- Where does this “s” value come from ? In my testing, it seems to match the dialplan extension that called the Dial app ?
- How can I control this value and send back a more useful value ?