Incoming call busy FreePBX (2.11.0.43) to FreePBX 16.0.10.40

Hi, Formerly I ran very old version of FreePBX (2.11.0.43) but it worked fine for many years. (-:
Now i moved to FreePBX 16.0.10.40
I tried to migrate the settings from the old setup where i had Generis SIP device and now I added extension (PJSIP), inbound route and a trunk
I installed 3CXPhone and managed to connect to the system but calls are rejected with status busy.
Can you please tell me what could be wrong.
I only need to setup incoming calls. I do not need outgoing.

Welcome to the forum George!

Please share a call trace of a problem call via pastebin: Providing Great Debug - Support Services - Documentation

Hi Igaetz, thank you for hint
That first part is the log on 3CXPhone connestion:
82.102.23.74 is where 3CXPhone is installed
147.180.23.146 is the IP of freepbx
This is the setup of the endpoint on the service where i buy numbers

3819	[2022-06-22 13:06:39] VERBOSE[7203] res_pjsip_registrar.c: Added contact 'sip:[email protected]:53631;rinstance=d8add493d18b28ed' to AOR '100' with expiration of 120 seconds	
3820	[2022-06-22 13:06:40] VERBOSE[7203] res_pjsip/pjsip_configuration.c: Endpoint 100 is now Reachable	
3821	[2022-06-22 13:06:40] VERBOSE[7203] res_pjsip/pjsip_options.c: Contact 100/sip:[email protected]:53631;rinstance=d8add493d18b28ed is now Reachable. RTT: 212.911 msec	
3822	[2022-06-22 13:06:51] NOTICE[7203] res_pjsip/pjsip_distributor.c: Request 'INVITE' from '<sip:999999999901114619022186:[email protected]>' failed for '194.110.113.236:52114' (callid: 1314299330-75074764-175492793) - No matching endpoint found

Here is what happens when i try to call

3823	[2022-06-22 13:09:15] NOTICE[7203] res_pjsip/pjsip_distributor.c: Request 'REGISTER' from '<sip:[email protected]>' failed for '143.244.42.103:58737' (callid: e5f4a985982535e4f7a) - No matching endpoint found	
3824	[2022-06-22 13:09:15] NOTICE[7203] res_pjsip/pjsip_distributor.c: Request 'REGISTER' from '<sip:[email protected]>' failed for '143.244.42.103:58737' (callid: e5f4a985982535e4f7a) - No matching endpoint found	
3825	[2022-06-22 13:09:15] NOTICE[7203] res_pjsip/pjsip_distributor.c: Request 'REGISTER' from '<sip:[email protected]>' failed for '143.244.42.103:58737' (callid: e5f4a985982535e4f7a) - Failed to authenticate	
3826	[2022-06-22 13:09:15] NOTICE[7203] res_pjsip/pjsip_distributor.c: Request 'REGISTER' from '<sip:[email protected]>' failed for '143.244.42.103:58737' (callid: e5f4a985982535e4f7a) - No matching endpoint found	
3827	[2022-06-22 13:09:15] NOTICE[7203] res_pjsip/pjsip_distributor.c: Request 'REGISTER' from '<sip:[email protected]>' failed for '143.244.42.103:58737' (callid: e5f4a985982535e4f7a) - Failed to authenticate

Hope the info above would help you tell me where to dig for solution?

You’ve provided nearly nothing other than what appears to be a successful registration for 100 and an unsuccessful registration for 3984.