Says she has had call waiting from the beginning, but before it always just gave a busy signal (I don't understand that part myself, thought call waiting eliminated busy signals, maybe a malfunction?). What should she do? Call her phone provider and cancel the call waiting?
Your friend can activate/de-activate call waiting herself, can't find the card with the codes on right now, the operator will tell you. A v92 modem recognizes the call waiting beep and attempts to put the internet call on hold whilst you take the call. Unfortunately, most ISPs don't support this feature yet so the call is disconnected.
Some people want this to happen, others don't!
A modem other than v92 will see the beep as noise and will disconnect the internet call.