Penobscot County's emergency dispatch center, which experienced a series of malfunctions over the weekend, was operational again at 11:30 a.m. today.

The Penobscot County Communications Center in Bangor, which dispatches emergency calls for 88 public safety agencies, suffered three shutdowns of its 911 system over the weekend.

Its 911 calls were routed to the center's backup, the state Department of Public Safety barracks in Orono, while technicians and engineers worked to fix the problem.

Cumberland County and the state Department of Public Safety also had to contend with breakdowns earlier this spring.