No audio when device is on mobile data

FreePBX Endpoints
1

called established, but no audio when caller is on mobile data. It works well when caller is on WIFI

2

Are you forwarding the correct RTP ports on your firewall to your PBX?

3

Use sngrep to watch for successful SIP connections and any negotiated SDP sessions, (many providers suppress voip)

4

I think so. it works when my device connected to WiFi. Device A (on WiFI) called Device B( on mobile data), call established with audio. But Device A (on mobile) called Device B( on mobile data), call established without audio.

5

Please confirm that it works when connected to Wi-Fi at another location. If not, the trouble is likely unrelated to mobile; it’s just that remote extensions aren’t working correctly, probably related to port forwarding.

Route/firewall make/model? VoIP-related settings in it? Does it get a public IP address on its WAN interface? If not, your modem is probably configured as a gateway. Make/model?

6

Yes, it works when connected to wi-fi at another location.

7

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