Connection Establishment with FortiVoice Behind Firewall

Hello Community,

I have an issue with achieving active connection to FortiVoice located behind FortiGate Firewall using FortiFone,

Below you can see the diagnostic report from FortiFone,

On FortiGate side, I created two vip rules forwarding traffic to FortiVoice, as shown below. Notice that I have 0 hits

Then I grouped these rules under “VIP-Group”.

And regarding the firewall policy I have created two policies as shown in image below, one to allow traffic forwarded from VIPs and one to allow internet access on FortiVoice.

I appreciate your guidance regarding this matter.