Hi, I have a persistent problem with Elastix 1.5.2. Basically, when an incoming call (on a dahdi trunk) is transferred to an external number (out another dahdi trunk) asterisk never clears those dahdi channels. ie. even after both parties have hung up 'core show channels' shows the call is still active (both dahdi trunks are still open). The PBX is in Australia, so unfortunately there is no form of disconnect supervison from the telco. The card is an OpenVox A400P (analog fxo's). I have put "options wctdm opermode=AUSTRALIA" in modprobe.conf I have defaultzone and loadzone set to au in /etc/dahdi/system.conf I have run fxotune -i I have busydetect=yes and busycount=6 in chan_dahdi.conf And after all this I have restarted the whole system There doesn't seem to be any noise or echo on either of the lines (either when calling via asterisk or when I connected an analog phone directly to the line to test). The only way I've been able to fix it is to restart asterisk each time it happens. Does anyone have any ideas on how to fix this?