Vodafone Greece Sip trunk issues

[MichalisE]

Hi,
I am trying to set up for my company 3CX with Vodafone Greece. I have a lot of problems with them to provide me the needed information for the sip trunk.

After 3 days of calls and endless discussions I managed to set up the trunk with authentication type as “Do not require - IP Based”, but I have the username/pass Vodafone gave me on the fields.

The inbound calls are working fine, but on the outbound calls when the other side answers the call is dropping.

Error message on 3CX log says that call or registration failed and replied 403 Forbidden (bad auth; from IP ***)

Any idea of what might causing this? If anyone worked with Vodafone GR before please help me.

We are using 3CX v16.0.1.273 on Windows Server 2012 r2.
P.S I am not even sure that I have the correct Gateway. But I suppose it wouldn’t work at all if was incorrect.

 

[MichalisE]

The SIP is connected directly on the provider's modem on the port that they specified for Voice IP (SIP).

The Internet (thus the Server-3CX) is connected through the EdgeRouter.

What can I do to check what's happening on the WAT side?

 

[eddv123]

If indeed there is a WAN side - has the provider given you any information to go on ? there could be a direct connection directly to their network (I setup something similar for TATA communications the other week - similar to this setup from Singtel: https://www.3cx.com/docs/asia-sip-trunk-singtel/

 

[MichalisE]

They made a specific WAN port (that I have connected on NIC 2 on Server) on their modem for SIP trunk which is the IP 10.10.0.2. I don't have any other information.

 

[eddv123]

So ive PM'd you the setup I did (and documented) for the TATA setup I did - I think by the sounds of it, its the same method - on premise 2 NIC cards and direct connection to provider - you could probably get some useful information from this .