Why does TiVo need a phone line?

The TiVo DVR connects to the TiVo service every 24 to 48 hours to download your program information. It will usually do a download during a pre-set time and only takes a few minutes. A phone line is also necessary during the TiVo Guided Setup, which connects and establishes your TiVo service. If the nearest phone jack is in an inconvenient location, you don