Disruption to 999 emergency calls in Southwater
About 1,500 phone lines were unable to dial the 999 service in part of West Sussex after a power outage at a telephone exchange.
The disruption affected telephone numbers starting with 01403 73 or 82 in Southwater, Sussex Police said.
The service was unavailable for about an hour and a quarter and was restored at about 14:30 BST.
Insp Mark Hammond said: "We are not aware of any adverse effect on local people."