SIP Trunk Configuration Instruction with VitalPBX Example Configuration provides you with a step-by-step SIP Trunk Configuration of ProSBC with VitalPBX systems, using the Web Portal configuration tool. Complete general installation configuration steps, before you begin configuring your specific scenario. In this guide FQDN (vitalpbx.telcobridges.com) configured in the VitalPBX server. If you don't use FQDN, you can use the VitalPBX IP address too. Please check how to configure the SIP Trunk in VitalPBX for ProSBC from VitalPBX Trunk Creation