Hello,
I know how to put the SIPAddHeader (Diversion) into asterisk diaplan for outbound calls on specific SIP trunk - but how can I add this to the FreePBX (from GUI) - without messing with the configuration files of FreePBX?
Edit: Hmm, erase the topic - similar to this one:
http://www.freepbx.org/forum/freepbx/users/sip-headers