US numbers are not displaying as US number when calling from the UK

[5i3cxuser]

Have a self hosted 3cx instance when calling from UK to a US it shows as an outbound US number as expected as this is how we have set some of the extensions to show the caller ID as however when calling from a US number to another US number the displayed outbound number is showing as a UK number which we do not own or have, i have raised this with the SIP rpvoider who ave advised that we need to amend the P-assertive Identitiy to show the caller ID of the outbound number i have done this however i am still getting the same issue of the wrong outbound caller ID.

 

[cobaltit]

Did you do a wireshark to confirm you are sending the correct number?

 

[5i3cxuser]

No, we have not run a Wireshark, if we did what options would we look to try and understand where the fault lies?

 

[leejor]

You have not explained if you are (the 3CX PBX is) located in the US or the UK.

I would first check the 3CX Activity Log to see what Caller ID you are actually sending for calls originating from the PBX. You can also check to see what Caller D you are receiving from your provider, before it is (possibly) being changed by any settings in the PBX.

It could be that your provider, or another intermediate provider along the way, is changing the caller ID, which you may not be able to control other than modifying it, once it reaches 3CX.

First confirm what you actually send and receive.