Extensions_additional.conf | Where are the include elements located?

[sorvani (Jared Busch)]

Exactly. You want to do something like I did here:

Need to add SIP header to outbound calls on PJSIP trunk

Here is my final solution. I welcome improvements. Caveats: The trunk name is Skyetel NoOp Traces in Dialplan set to 1 in Advanced Settings All outbounds routes start with known values to match against. [macro-dialout-trunk-predial-hook] ; Much thanks to Lorne Gaetz with Sangoma for answering questions. ; https://community.freepbx.org/t/need-to-add-sip-header-to-outbound-calls-on-pjsip-trunk/60441/4 exten => s,1,NoOp(Entering user defined context [macro-dialout-trunk-predial-hook] in extensi…

Edit: the context [sip-diversion-header] does not exist on my Asterisk 16 based FreePBX 14 systems. I don’t have immediate access to a system running something else to check against.