I have six non-agent users reporting SAC is intermittently turning on and their phones ring only once then go to voicemail. I've statused all the stations and haven't found one that was in the process of doing this. In the case of one user I spoke with, he stated that the light on the SAC button turns on when this happens, he'd hung up the receiver and he noticed the light had turned on by itself. Does anyone have any ideas for resolving this unusual problem? Thanks for the input.