I believe I found a solution to issue 1 Disable reinvite on PJSIP trunk? Is this possible thru gui?
when i reviewed the CHAN settings for the trunk it shows session-timers=refuse, this was a setting directed by Nextiva in their CHAN settings. https://www.nextiva.com/wp-content/uploads/legacy/downloads/guides/SIP-Trunking/NextOS-SIP-Trunking-FreePBX-Setup-Guide-v1.0.pdf
To get this effect, I added the code listed in my first link.
Now if i can figure out why things just disconnect…