Hello to all.
I have a connection with an Isp through a pjsip trunk .
They use the RFC 5009 for the P- Early - Media. This means that they require that my 183 Progress message response to have the header P-Early-Media=sendrecv, so that they allow early media.
Is there a way that I can add the header in the 183 progress.
Asterisk version: 16.20