Although I don't have a phone line connected to my DVR, that doesn't mean I don't have a landline... I most certainly do, and always will. Cellular is not reliable. There's no cell service where I live (we use a microcell), and even where there IS cell service, it's not 100% reliable and so can't be depended on in emergencies. The towers get overloaded (remember 9/11? No one could make cell calls), power outages can cause problems... especially in our situation, where cellphones will only work for as long as we have battery/backup power. Verizon just had a 911 outage the other day that made the news, and AT&T has had their own set of outages. Meanwhile my landline always works, and we have a backup corded phone connected to it just in case. Considering we already pay for DSL, the few extra bucks for a reliable phone line is a worthwhile and prudent investment.