Hi All, I am trying to bridge a call & want to play a sound file when legb answers. here is dialplan: <extension name="incoming"> <condition field="destination_number" expression="^4948667$"> <action application="answer"/> <action application="bridge" data="{execute_on_answer=playback /srv/sounds/oriental-insurance-deepawali-demo.wav}freetdm/1/a/9873244228"/> <action application="hangup" /> </condition> </extension> Here I am using Sangoma card & libsng_isdn library (I have tested with latest stable FreeSWITCH, wanpipe driver & libsng_isdn). FreeSWITCH: FreeSWITCH Version 1.0.head (git-9bf2726 2012-03-14 23-26-09 -0500) I have updated with v1.2.stable but same observation WANPIPE Release: 3.5.28 libsng_isdn.so.9.9.9, I have now updated it with libsng_isdn.so.7.27.2 I am getting following error: 2013-07-22 12:44:53.725215 [WARNING] ftmod_wanpipe.c:1033 [s1c2][1:2] Failed to read 4096 bytes from sangoma device: No buffer space available (-65) 2013-07-22 12:44:53.725215 [WARNING] ftdm_io.c:4059 [s1c2][1:2] raw I/O read filed 2013-07-22 12:44:53.725215 [WARNING] mod_freetdm.c:776 Failed to read from channel FreeTDM/1:2/09873244228 device 1:2! 2013-07-22 12:44:53.805207 [WARNING] ftmod_wanpipe.c:1033 [s1c2][1:2] Failed to read 4096 bytes from sangoma device: No buffer space available (-65) 2013-07-22 12:44:53.805207 [WARNING] ftdm_io.c:4059 [s1c2][1:2] raw I/O read filed I also raised this issue with sangoma ( http://support.sangoma.com/index.php?/Default/Tickets/Ticket/View/9246) but got no conclusive response in last 6 months. Kindly help in resolving same. thanks & regards, Siddharth