I am trying to add a number to the begining of a caller id in the extensions.conf
I have calls coming in on a 800 number and I am forwarding them to a mobile. This is working by making an IAX2 call out.
I am trying to edit the caller id to add the prefix 0800 so when the call comes through to the mobiel I know its coming from the 800 number.
What arguments do i need to pass to the SetCallerID string in the dial plan to add 0800 to the existing callerid. In other words I want to pass the incoming callerid with 0800 attached to it to the mobile.