Hi, very happy with freeswitch as a PBX/softswitch/SBC system its working solidly for a few weeks now - just great I have a question regarding ringback tones - custom or regular - I cant get freeswitch to send ringback using G729 I used the following settings ( it will just play one of the IVR prompts as ringback (filename ivr-to_repeat_these_options) - I took it from the G729 encoded files package , it has PCMA , G729 G723 extensions ) <extension name="inbound_routing"> <condition field="destination_number" expression="^4420885767(0\d)$"> <action application="set" data="ringback=/usr/local/freeswitch/sounds/en/us/callie/raw_files/ivr/ivr-to_repeat_these_options"/> <action application="set" data="instant_ringback=true"/> <action application="bridge" data="user/10$1"/> </condition> </extension> when I call with G711 enabled , it plays the file no problems - see log 2009-09-25 11:29:58.641361 [DEBUG] sofia.c:3289 Channel sofia/external/442078562107@80.80.80.80 entering state [early][183] 2009-09-25 11:29:58.641361 [DEBUG] switch_core_session.c:630 Send signal sofia/external/442078562107@80.80.80.80 [BREAK] 2009-09-25 11:29:58.641361 [DEBUG] switch_ivr_originate.c:1718 Raw Codec Activation Success L16@8000hz 1 channel 20ms 2009-09-25 11:29:58.641361 [DEBUG] switch_ivr_originate.c:1745 Play Ringback File [/usr/local/freeswitch/sounds/en/us/callie/raw_files/ivr/ivr-to_repeat_these_options.PCMA] 2009-09-25 11:29:58.641361 [INFO] mod_native_file.c:82 Opening File [/usr/local/freeswitch/sounds/en/us/callie/raw_files/ivr/ivr-to_repeat_these_options.PCMA] 8000hz 2009-09-25 11:29:58.889369 [DEBUG] sofia.c:3289 Channel sofia/internal/sip:1006@82.80.131.233:40505 entering state [proceeding][180] when I call with G729 only - I get silence , and freeswitch only send the comfort noise packet and no RTP , see log 2009-09-25 11:28:57.437537 [DEBUG] sofia.c:3289 Channel sofia/external/442078562107@80.80.80.80 entering state [early][183] 2009-09-25 11:28:57.437537 [DEBUG] switch_core_session.c:630 Send signal sofia/external/442078562107@80.80.80.80 [BREAK] 2009-09-25 11:28:57.685536 [DEBUG] sofia.c:3289 Channel sofia/internal/sip:1006@82.80.131.233:40505 entering state [proceeding][180] 2009-09-25 11:28:57.685536 [NOTICE] sofia.c:3353 Ring-Ready sofia/internal/sip:1006@82.80.131.233:40505! mod_native_file works well for me when used in applications and plays G729 files no problem any ideas why is that happening , any suggestions on how to resolve ? thanks Ori