I am having a SIP trunk from GO Malta and since the beginning (about 6 months ago) I am having issues with international calls reaching our PBX, 3CX V18 currently installed but same issue was there with V16.
When call is placed from international number it doesn't reach our PBX not even our Firewall. Our firewall is SonicWall TZ400.
All Inbound / outbound rules and NAT policies done as per below links + the instructions received from GO
https://www.3cx.com/docs/sonicwall-firewall-configuration/
https://www.3cx.com/docs/maltese-sip-trunk-go/
The trunk is registered, inbound calls from Malta are fine, but no inbound calls from abroad. Initially this was happening just for the inbound from some countries but since yesterday for most countries.
All I am getting from GO is that our PBX is not responding to the Invite requests they are sending to our public IP, but I simply don't see any traffic coming from their IP ranges.
Sometimes when I refresh the registration of the trunk the international calls are passing through but if the registration is refreshed once again they are gone. Naturally this is not a solution for me, to keep refreshing the registration.
Simultaneously I am having a trunk from Vanilla Telecoms Malta terminated on the on the same 3CX server, using the same internet connection and firewall and all is working like a charm. I can see the invite requests from their IP and the international calls are passing through without any issues.
So if anyone faced a similar issue with GO Malta please help as I am out of options and really considering moving my DID ranges from GO to Vanilla Telecoms although they are not officially licensed with 3CX.
Thank you.
When call is placed from international number it doesn't reach our PBX not even our Firewall. Our firewall is SonicWall TZ400.
All Inbound / outbound rules and NAT policies done as per below links + the instructions received from GO
https://www.3cx.com/docs/sonicwall-firewall-configuration/
https://www.3cx.com/docs/maltese-sip-trunk-go/
The trunk is registered, inbound calls from Malta are fine, but no inbound calls from abroad. Initially this was happening just for the inbound from some countries but since yesterday for most countries.
All I am getting from GO is that our PBX is not responding to the Invite requests they are sending to our public IP, but I simply don't see any traffic coming from their IP ranges.
Sometimes when I refresh the registration of the trunk the international calls are passing through but if the registration is refreshed once again they are gone. Naturally this is not a solution for me, to keep refreshing the registration.
Simultaneously I am having a trunk from Vanilla Telecoms Malta terminated on the on the same 3CX server, using the same internet connection and firewall and all is working like a charm. I can see the invite requests from their IP and the international calls are passing through without any issues.
So if anyone faced a similar issue with GO Malta please help as I am out of options and really considering moving my DID ranges from GO to Vanilla Telecoms although they are not officially licensed with 3CX.
Thank you.
