Apologies, that should have been the first thing I added to my post. The triple beep is coming from the HT/transceiver. I checked my "alert tone" options inside the CPS software to see if something changed somehow. No alerts options are selected. I also read somewhere about alerts possibly selected within the digital contact list, and I check those as well. No alerts set there either. I checked even though I know everything was fine for a while even after I updated the 878 (ver 3.0) and updated my digital contact list. I can't figure it out. There aren't too many articles I can find where someone had a similar issue. Thanks again.