I was quite unpleasantly awakened at around 3 AM this morning by two calls in rapid succession that rang on line 2 only (both lines have the same number). They showed up on the caller ID as "1001" for both the name and phone number. Nobody was on the line when I answered, and neither call shows up in my call history. I've submitted a ticket regarding this matter and thought I'd see if other customers have experienced anything like this.