Hi Klaus,
MAybe openser tries t do some DNS lookups which may take long time.
The best would be to set debug=4 and "tail" to the logfile (default=/var/log/syslog (or /var/log/messages on RedHat&co)).
I was running at debug level 6 already, and dumping the output to screen.
However, I actually found the error last night: Beeing new to all this, I had mediaproxy and proxydispatcher running on the machine - primarily as a proof to myself that they where installed and seemed to work. I assumed they wouldn't interfere with OpenSER as long as the support modules wasn't loaded, but alas, I was wrong: As soon as I stopped mediaproxy and proxydispatcher, OpenSER started working as expected.
The problem is reproduceable - but I think it's a bit strange behaviour?
Regards, Lars