Gateway is registered with 3cx server. We can route incoming calls to any extension however we cannot make any outgoing calls. Our outbound rule is ok 3cx server is not blocking the gateway with exisiting gateway configurations there is no problem with 3cx verison 14. This problem only occurs in version 15 or above. We have tried to factory reset gateway We have tried with freshly installed 3cx server v15 and v155 We have tried to register gateway to 3cx both as SIP trunk and gateway but non worked and suggestions?