I have an asterisk server running and got a few queues configured. When a call comes to the server it redirects to the default IVR who offers the caller the options of which department they want to talk with, starting with the queue 1 (most selected). When the caller press 1 to be redirected the call simply hangs. When other queues are selected the call is transfered and the extensions are called.
I solved this problem creating another queue with the extensions of the queue 1 and configured to be redirected to this queue. This problem started do occur with no cause. Before this happens, the queue 1 worked fine for months.