I have checked out the logs you provided and can see the connection succesful and then 2 minutes later it fails and trys to reconnect. If you can turn MediaPortal logging level to Debug (via MediaPortal Configurtion), we maybe able to see the exception which is causing this failure.
In the other thread (https://forum.team-mediaportal.com/...erisk2mediaportal-plugin-94172/#post720729) I have now posted a trouble shooting guide on the API connection itself and how to complete testing from a command prompt.
May I suggest also to disable the mailbox check and just trying an inbound call to your sip to see if you get notification. My asterisk and PIAF is a later version than yours and it maybe the mailbox check command that is causing the issue. The troubleshooting guide may show this discrepancy. If you can, compelte the troubleshooting guide and post your results from it so I can see what is going on...
In the other thread (https://forum.team-mediaportal.com/...erisk2mediaportal-plugin-94172/#post720729) I have now posted a trouble shooting guide on the API connection itself and how to complete testing from a command prompt.
May I suggest also to disable the mailbox check and just trying an inbound call to your sip to see if you get notification. My asterisk and PIAF is a later version than yours and it maybe the mailbox check command that is causing the issue. The troubleshooting guide may show this discrepancy. If you can, compelte the troubleshooting guide and post your results from it so I can see what is going on...