3CX Hosted SMB Free V20 – VoIP.ms SIP Trunk Registered but Outbound Calls Fail (403 Forbidden)

[costionofrei]

Hello 3CX Community,

I'm running 3CX Hosted SMB Free V20 Update 10 (build 1716) with VoIP.ms as my SIP provider.

Since the official VoIP.ms template is unavailable in my SMB interface, I configured the SIP trunk using the Ahoy Telecom template.

Current situation:

• SIP trunk registers successfully.
• Outbound rules correctly select the VoIP.ms trunk.
• Calls to both Canada and Romania fail with SIP 403 Forbidden.
• VoIP.ms technical support identified a possible SIP header mapping issue.

Current outbound INVITE:

From: "5142404830"<sip:[email protected]:5060>
Contact: <sip:[email protected]:5060>
According to VoIP.ms support, the From and Contact URI user parts should contain the SIP authentication ID rather than the outbound Caller ID.

Unfortunately, the SMB Free interface does not expose advanced SIP header mapping settings.

My questions:

1. Has anyone successfully configured VoIP.ms with 3CX Hosted SMB Free V20?
2. Is there a supported way to correct these SIP header mappings without changing editions?
3. If SMB Free cannot support this configuration, which 3CX edition and deployment model would allow it?

I would prefer to retain my existing hosted PBX if possible.

Thank you for your assistance.

 

[bitn2]

Only supported trunks are avaiable with SMB.