ContributionsMost RecentMost LikesSolutionsRe: Dropped Calls I was having the same problem with calls dropping after 30 minutes. Began after Cox replaced my old phone modem. I read here about the phone line being connected to the Tel 2 vs Tel1 input. Mine was connected to Tel 2. I disconnected everything and plug into Tel 1. After rebooting the problem appears resolved. Time will tell🤞