I have several atas and I am getting random calls that dont disconnect after hangup. In fact the called number rings repeatedly, end user answers, no one there, hangs up, rings again over and over. Then I look at the call log and i notice a 300 minute call to that number. Apparently the time outs are set to 300 minutes so the system thinks the call is active for 300 minutes then finally hangs up when the timer expires.

What in the world is causing this? Customers are getting pissed and im losing lots of money.