Hello, I have problem with my 3CX phone system and the provider 12connect. When i make an inbound call, the call gets disconnected after 30 seconds because there was no "ACK" received from 12connect. When i make an outbound call there is no problem. Someone posted the 12connect config here and stated there where no problems. I am not the only one with this problem because multiple people posted on the board with the statement they get cut off after 30 seconds. I think same problem different provider. specs: 3CX software V7 STUN disabled static external IP address custom source ID host part with my external IP address When i enter the number directly into my 3CX VoIP phone client there is no "ACK" coming back either but i don't get disconnected. Maybe someone can help me with this. Thanks in advance!