Phone service was restored to various networks after it was down for the better part of Wednesday, according to statements from officials. New Milford and Fairfield police departments, as well as Brookfield Public Schools, Nuvance Health and Hartford HealthCare, said their phone lines were having problems Wednesday, citing a statewide issue with the phone system. Police in Fairfield said Frontier reported a fiber issue leading to a loss of service statewide. All town lines were affected, but the 911 system continued to be fully operational. The issues were resolved later in the day, Frontier said in a statement to Hearst Connecticut Media around 5:40 p.m. John Rossi, the vice president of systems and Fairfield region operations for Hartford HealthCare, said phone lines starting with the area code 475 were affected early evening Tuesday and were functioning again around 3:30 p.m. Wednesday. The health care organization did have mitigation efforts in place, rerouting calls to appropriate offices via a switchboard. "No care was delayed," Rossi said. Still, the outages were "concerning," Rossi said, and is unsure why the issue occurred in the first place. Rossi said he hopes Frontier is "putting in the necessary steps to make sure it doesn't happen" again. John W. Barile, superintendent of Brookfield Public Schools, said a service outage with Frontier was affecting the entire phone system. "This outage is part of a larger service breakdown affecting both inbound and outbound calls for much of the Fairfield County area and throughout Connecticut," Barile said. "This current situation is impacting both private and public sector entities." Barile said some calls went through, but the service was inconsistent overall. Nuvance Health said it was working with its vendor to resolve an inbound phone call problem that impacted Danbury, New Milford and Norwalk hospitals. Medical practices in those areas overseen by Nuvance Health were also having this issue. Nuvance Health said its hospitals and other medical facilities were fully open and are keeping appointments. Staff writer Liz Hardaway contributed to this report.