I have established a new SIP trunk with my SIP provider.
It’s a PJSIP trunk with no out of the ordinary setup. Calls are working both inbound and outbound, however when I dial outbound, I am getting a +1 (US) number show on my mobile phone.
I have set the CallerID on my SIP trunk to the number that should show, however it is still showing as +1
My SIP provider has replied saying:
“Please verify that you are using the +E164 numbering format in all SIP Headers”
“The +E164 is the standard format in Enterprise SIP”
Can anyone point me in the right direction to ensure I am using this format? where would this be set in the PJSIP trunk settings?