I spoke too soon. Using Freeswitch version Feb 01, 2010 and Wanpipe Driver ftp://ftp.sangoma.com/linux/custom/DavidYS/wanpipe-3.5.10.smg_pri.1.tgz, the FS core will dump if I call my external cell phone, answer and then hangup. See the pastebin: http://pastebin.freeswitch.org/12035. This happens every time. Best Regards, Jerry