need help recreating a working outbound call

we had to rebuild our PBX and while trying to get outbound calls to work we are having issues. The system is an Incredible PBX 2027 D and connecting lines through VoIP.ms. All incoming calls are working great. We cannot get outbound calls to connect and have read through and tried several dozen things. Attached is a log from Asterisk logfiles and PJSIP Logging during an error.
Thank you for the assistance.
https://pastebin.freepbx.org/view/01ab0367

SIP/2.0 503 Service Unavailable
Via: SIP/2.0/UDP 172.245.154.157:5061;branch=z9hG4bKPj164a56ba-2d17-4afd-801c-aa                                                                                                                                                             87ab1277ae;received=172.245.154.157;rport=5061
From: <sip:[email protected]>;tag=bfd59a26-f8d0-401e-a695-d10bc1217f

503 is a fairly generic “I don’t like you”. My best guess is that it doesn’t like the user part of the From header; what does that represent?

Try setting From Domain to atlanta1.voip.ms

If no luck, try enabling ulaw on the trunk – possibly g722 is supported for only some destinations.

Tried the changes and they didn’t work… because they started blocking the IP address of our PBX after a year of use! Thank you for the assistance.

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