DID numbers returning 403:Forbidden

[Will Wagner]

We have our sip trunk all setup and working for our voip provider. Incoming and outgoing calls to the main trunk number all works fine.

I'm now trying to get our DID/DDI number block working. I have:
- added the DID to the SIP Trunk
- added the DID to an extension

At this point I would expect that when I call the DID I'm connected to the extension.

If I look at a packet capture of a call to the DID I see the invite message from our voip provider. Then 3CX responds with a 100 Trying message and shortly thereafter a 403 Forbidden message. Inside the message header it has 'Warning: 499 Caller is not identified'

What have I got wrong?

Thanks
Will

 

[Saqqara]

Have you setup Inbound rules for the DDI number ?

Look on the activity log, and see what numbers are being passed from your voip provider - you may have to use * (wildcard) - if you DDI number is 01234 567890 use *567890 as the DDI number,

 

[Will Wagner]

Have you setup Inbound rules for the DDI number ?

By adding the DDI number to the extension the inbound rule has been automatically created. It is there if I look at the inbound rules

Look on the activity log, and see what numbers are being passed from your voip provider - you may have to use * (wildcard) - if you DDI number is 01234 567890 use *567890 as the DDI number,

Ok, activity log really helpful, should have looked there earlier. Made the mistake of looking at call log which is not helpful.

The error is that I have two identical did as one is my providers primary trunk and the other is the backup. This is how they told me to configure it. I will go back to them and see how they say this should be setup.

 

[CentrexJ]

You can have duplicate DID's but only if one or both are registration based. If using IP based trunks you can't have a duplicate DID.

 

[Will Wagner]

You can have duplicate DID's but only if one or both are registration based. If using IP based trunks you can't have a duplicate DID.

Thanks, that's what I needed to know.

Will

 

[YiannisH_3CX]

You can have duplicate DID's but only if one or both are registration based. If using IP based trunks you can't have a duplicate DID.

This is not entirely true. If your provider does not support rInstance you might run into the same issue without proper source identification. As a rule i would recommend avoiding having the same DIDs in 2 trunks.