FreePBX Dropping Mobile Wi-Fi Calls

Employees are in an area where there is bad cell service which is resulting them to used Wifi calling feature on their phone. When they call in, the line is dead silent and eventually hangs up. In the call logs I can see their number hitting the server. I am able to dial from my freepbx landline to a cellphone that is using Wifi calling. Anyone know what may cause this? All other regular calls from landlines and mobile networksto the freepbx work fine

If all calls are working fine, and only these “Wifi Callers” are having this issue, then I suspect it’s a Wifi calling issue, nothing related to your PBX.

… except that WiFi calls would require an Ethernet connection, and one-way audio (which this sounds like) is almost always a NAT configuration error…

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