Phone problems that knocked out 911 service in Calistoga for much of Tuesday have been resolved and emergency service restored.

The phone system shut off at about 9:30 a.m. and emergency calls were being routed to St. Helena police.

Calistoga police issued a public alert about the phone issues, asking that non-emergency calls be made to (707) 942-2811 and notifying people that St. Helena police would answer 911 calls.

A Calistoga police dispatcher said the day was quiet in town and no emergency calls had been taken by St. Helena police.

The cause of the failure hadn't been determined, the dispatcher said, but technicians were analyzing the electrical wiring.

Service was restored around 3:30 p.m.