Configure Fortinet for FortiVoice
Allowing VoIP calls using FortiVoice and FortiCall
This example sets up inbound and outbound Voice over IP (VoIP) calls using
Session Initiation Protocol (SIP) through the FortiGate unit, using a FortiVoice unit
and FortiCall services.
https://docs.fortinet.com/uploaded/files/1649/allowing-VoIP-calls-using-FortiVoice-and-FortiCall.pdf