I’m having a strange issue occur when trying to retrieve a parked call. The way in which my test rig at the office work is that we all have 2 parking buttons on our phones for slot 1 and slot 2. *8571 and *8571. Parking calls work fine every time. Occasionally, I would say 3 times out of 10 when we retrieve the parked call, we cannot hear the caller and have to call them back. Any ideas? Has anyone else had this problem?