Carrier Wifi Calling not working with FortiGate and Asus

[m_hamja]

Hi Experts,

I'm using FortiGate 80E with firmware version 7.4.1 for my network. I have an Asus RT-AC88U as access point for my wireless access. 

My carrier Wifi Calling not getting enabled on our mobiles. Is there any specific port or services that i need to enable on Lan to Wan policy? Kindly guide me. Thank you.

[abarushka]

Hello,

You may consider to run debug flow and try to reproduce the issue:

diagnose debug flow filter addr <phone IP address>
diagnose debug flow show function-name enable
diagnose debug flow trace start 100
diagnose debug enable

and check failed session setups.