Hi Guys, I previously posted questions about getting RFC4575/4579 working with Freeswitch, and in terms of SUBSCRIBE/NOTIFY this is working fine so thanks very much for the help. I just wondered if it had been tested, in particular around RFC4579, and section 5.2; 5.2. INVITE: Adding a Participant by the Focus - Dial-Out To directly add a participant to a conference, a focus SHOULD send an INVITE to the participant containing a Contact header field with the conference URI and the 'isfocus' feature parameter. I have tested this, I cant see ;isfocus on the contact header field, when getting freeswitch to add a participant using originate, be it manually or via api. Is there again any particular syntax required for this to work, or has it been tested, as I just see the standard contact header of <sip:mod_sofia@xx.xx.xx.xx:5080> and no ;isfocus. Many thanks Jon