G'Day All, Attached is a draft copy of H.246 Annex C. As you can see it is Version 0.0 so it needs some work. It is based on Q.699 as is split into 4 main sections: 1 Overview/Introduction 2 ISUP to H225 message and parameter mapping 3 Outgoing Call - H.225 to ISUP Basic Call Services 4 Incoming Call - ISUP to H.225 Basic Call Services The services sections need some work to align with the 3pty/conference discussions. RAS hasn't been considered in the document yet. Comments/addition/amendments welcome. Regards, Christian Groves