Hello, since yesterday I do a real life test with FS in a 40 sip extension environment with TDM connection via wanpipe/sangoma A104d. I detected two times the problem, that openzap stops working, while SIP calls worked. Only restarting helped. Maybe reloading of mod_openzap helps as well, but I didn't tested that, yet. I filtered FS logfile for hints of that problem and I found a growing number of this line: 2009-02-06 11:09:51 [INFO] ozmod_isdn.c:706 zap_isdn_931_34() Duplicate SETUP message(?) for Channel 1:21 ~ 1:21 in state DOWN [ignoring] Befor restart I saw such a line for *each* TDM channel and no one was able to dial out. mod_openzap handled around 40 outgoing calls until last restart . Since last restart FS runs good for 2 hours now without any duplicate SETUP in log ... Has anybody similar problems? regards Helmut