Outgoing call hangsup after x rings

I am dialing an external number but * hangs up after x rings. Does anyone know a setting that prevents this? I am using WaitTime in a call file and this is set to 60. The number I am dialling will go to voicemail after about 15 rings but * hangsup well before that.

Thanks!

Maybe the problem is coming from busydect=yes and busycount=X. If you are using thoses to function, try increasing the number of busycount or disable busydect and busycount.

Thanks for the reply. I am using neither of those two settings, nor do I know where they would be.