Is your phone just plugged in or is it cordless and plugs into a base unit to recharge?
If the latter it's because the base unit is off during a power cut and the cordless handset cannot connect to the phone line without power to the base unit.
Please remember to mark Solved Posts with Best Answer. Doing so helps other customers and saves TalkTalk's Support Team time by only looking at unsolved topics. Thanks, Steve (a fellow customer).
