Hi, Currently 3CX has lost audio both inbound and outbound which results in having to restart the SIP service and then everything starts to work again for a short period of time. I have checked all firewall ports and we are up to date on the current release build of 3CX. This issue has had me reboot the service 5+ times today so far and we have not experianced anything like it before. The intial voice prompts when a person calls the office is also silent untill the sip service is rebooted. I have noticed in the Activity Log that wer are getting an huge ammount of "Reason: Credentials don't match, check that authorization-ID and password match the ones in extension settings" but 3CX does not appear to be blocking the attempts after me entering the IP in the deny access Any info or pointers to put me in the right direction wopuld be really appreciate as I'm running out of options here.