Not receiving inbound calls

[oguruma1218]

I am not receiving inbound calls from outside the PBX. I can make outbound calls and I can call other extensions via the PBX. Inbound calls to my DID give me 3 beeps then fail OR "the number you have dialed has been disconnected or is no longer in service"

Firewall checker passes all tests. Trunk (Flowroute) shows as registered.

I don't see anything in my activity log at all for incoming calls.

I contacted Flowroute and they said:

I have located your call example. We are attempting to deliver this call to you however your PBX is rejecting it with a 407 proxy authentication challenge. In 3CX this is often caused by the PBX not recognizing the inbound number or looking at the wrong field for the number. We have an excellent 3CX guide on our support portal which I wrote.

I followed the guide that he sent me (which requires registering the SIP as generic, but okay.


Anybody have any ideas?

 

[cobaltit]

Did it ever work? It would be pretty difficult for your PBX to reject it and you not see it in the logs. Make sure you have the logging turned up to verbose and try again.

 

[oguruma1218]

It was actually fixed by turning off Call Source Identification.

I let Flowroute know that this was the fix. I don't fully understand under which circumstances that Call Source Identification is necessary, though.

 

[YiannisH_3CX]

Hello @oguruma1218

Specifically for Flowroute we have enabled the call source identification and the "strict mode" as per the providers request.
What this does is it checks the Invite for the data specified in the call source identification and also checks the DIDs for an exact match.
This will allow you add a second Flowroute account to the PBX if needed if your DIDs for each account are different. This however disables the "catch all" functionality of the PBX. So if you have entered your DIDs to the PBX in a different number format than the one the provider is using, this will cause your calls to fail as the PBX is unable to match the incoming Invite to a DID.