Hi Pcbliss, and welcome to the board.
I'm not one of the Samsung techs, so I'm afraid I might not be much help, but maybe I can ask you a few questions that will help us get to the bottom of things. I may have heard the type tone your referencing, but I can't quite remember from where. Is it like the two tones are connected, as in "t o n e-beep?"
Also, what kind of lines are being used? Are they POTS, SIP, are they coming across an IAD?
Is this heard on all lines or just specific ones?
Is this heard from all extensions on the system?
Maybe this will get us started.
Thanks for the question.