The round-the-clock availability that cell phones and pagers have brought to people's lives may be <A HREF="http://news.zdnet.com/2100-1035_22-6019713.html?tag=zdnn.alert">taking a toll on family life,</A> a new study suggests. The study, which followed more than 1,300 adults over 2 years, found that those who consistently used a mobile phone or pager throughout the study period were more likely to report negative "spillover" between work and home life--and, in turn, less satisfaction with their family life.