Hello All, Is there a proper way of handling 183 messages with SDP body generated from a PSTN gateway? I used this code snippet: if ((isflagset(6) || isflagset(7)) && (status=~"(180)|(183)|2[0-9][0-9]") if (!search("^Content-Length:[ ]*0")) { use_media_proxy(); Unfortunately, the media SDP body included in the 183 Session Progress message still can't be heard on the calling party. Are there any workarounds on this? Thanks!