911 system working again in Massachusetts; Cause of outage under investigation CBS Boston‘We Just Always Expect It to Work’: 911 Outage Shows System’s Perils The New York TimesCause of 911 outage in Massachusetts revealed; here’s what happened WWLP.comMassachusetts 911 system restored following statewide outage – Boston News, Weather, Sports Boston News, Weather, Sports | WHDH 7News911 Restored: Massachusetts emergency phone lines working after outage Worcester Telegram