hello everyone, The steps of my call recovery test as below. 1.First I added the line "<param name="track-calls" value="true"/>" to internal.xml. 2.UA called 9664 to play the hold music, and then run "fsctl crash" command. 3.start freeswtich and run "fsctl recover" command. 4.call was interrupted, recover failed. I opened siptrace before "fsctl recover", the sipflow make me can not understand. freeswitch send INVITE to UA freeswitch recive 200 from UA freeswitch send BYE to UA freeswitch recive 200 from UA freeswitch send ACK from UA My freeswitch is only single server, the version is V1.6.19. I have tried the newer version V1.6.20, but the result was same. What's the reason? Pls give me some suggestion, thx a lot. ------------------ With regards, Kevin Chi