Hey all... I need to tap the collective knowledge of all. In the scenario where I can get a Reason header in a Progress response ( 180 / 183 ) how can I control how Freeswitch will respond. I can see 3 possible scenarios here, but it would be great to control which scenario was used. 1) Freeswitch just passes through the 180/183 with reason header... without doing anything with it. 2) Freeswitch can remove the reason header from the 180/183 and just play back the media stream that is accompanied. 3) Freeswitch can act upon the reason, and hangup the call .. ( if its a Q850 Cause code 1 for example ) now... where is this useful. well, what if I had a carrier that gave Q850 cause codes in ISDN progress messages ( number unallocated ) but then they played an RVA saying "number dialed is not connected". They have done it this way to allow customer to choose how to handle the RVA ( do you want the RVA or not ) but does FS give me the ability to truly control this ? ( without needing to go as far as complex ESL applications ) -- Sincerely Jay