What kind of "phone attack" is this? 469-208-3796 rang our home land line. While the landline was still ringing, the same caller rang our business number. Both calls hung up shortly into voice mail greeting. Then both numbers rang again, home line first and business line while home line was still answering. Again, each call hung up shortly into the voice mail greeting. Four calls in less than 30 seconds. Caller ID reports "Carrollton TX."