LEBANON — Upper Valley emergency service agencies, health care providers and businesses felt the impact of a global internet outage that started early Friday morning.

Around 9 a.m., Dartmouth Health reported that its “locations are experiencing a widespread outage of multiple systems,” according to an announcement posted to its Facebook page. Dartmouth Hitchcock Medical Center and Alice Peck Day Memorial Hospital in Lebanon, Mt. Ascutney Hospital and Health Center in Windsor and New London Hospital are among the nonprofit organization’s locations.

“Primary impacts involved access to several hospitals’ medication dispensing machines and some of our computers,” Dartmouth Health posted to its Facebook page at 2:20 p.m. “Solutions have been identified and deployed. There have been minimal appointment cancelations from select Dartmouth Health members.”

The trouble stemmed from an update issued by cybersecurity firm CrowdStrike, which affected customers running Microsoft Windows. It was not the result of hacking or a cyberattack, according to CrowdStrike, which apologized and said a fix was on the way.

Businesses and governments worldwide experienced hours-long disruptions — their computer monitors glowing blue with error messages — and scrambled to deal with the fallout.

New Hampshire’s 911 system was out for around 2½ hours early Friday morning and has since be restored. Around 1 a.m., New Hampshire emergency dispatch workers reported that they were having difficulty picking up 911 calls, according to a news release from New Hampshire’s Division of Emergency Services and Communications.

“They could see incoming 911 calls on their computer systems, but they were unable to answer those calls,” according to the release. “Calls that were initially unable to be answered by telecommunicators were quickly returned to ensure 911 callers received the help they needed.”

The state “immediately implemented” the system’s backup procedures and around 3:30 a.m. all calls and texts were “being received normally.”

Hanover Regional Emergency Communications Center — the largest dispatch provider in the Upper Valley — was affected by the outage. On Facebook, they advised those in need of services to bypass 911 and instead call the dispatch center directly at 603-643-2222.

The communications center serves more than 25 towns and 62 agencies throughout the Twin States including the New Hampshire towns of Cornish, Croydon, Plainfield, Meriden and all five Mascoma Valley towns. Only New Hampshire communities were affected, said communications coordinator Doug Hackett.

“We are not aware of any missed calls,” Hackett said. “The time of the day that it happened was probably the best time of day that could happen because our call volume is notoriously low at that hour.”

The majority of the 911 calls Hanover receives come from cellphones, he added. Whenever someone calls from a cellphone, the center gets a notification from a system called RapidSOS and dispatchers can return calls using that information.

“NH 911 has built up a very robust system with lots of redundancy and this is the first time in my career that we’ve had a failure of this magnitude,” said Hackett, who has worked in dispatch since 1990. “I think 911 is absolutely the number to go to in an emergency, but I think everyone should be prepared and know their local seven-digit number in case they can’t get through.”

Hanover’s seven-digit number is 603-643-2222.

Hartford’s Emergency Communications Center, which also handles dispatch services for Windsor, did not have any disruptions.

Dartmouth College has faced some issues with PCs that use Windows OS, according to Morgan Kelly, senior media relations officer.

“Our Office of Information, Technology and Consulting is working to address these issues and has provided resources for people needing tech support,” Kelly wrote in an email.

The Upper Valley-based Jake’s Market & Deli convenience store chain had locations affected by Friday’s outages because cash registers were not working, owner Bruce Bergeron said. Some, including Canaan, had to close in the morning, while others were down to one register.

“The majority of stores right now can’t take credit cards,” Bergeron said, adding that at some locations people could pay for gas using credit cards at the pumps, but couldn’t inside the stores. “Even more problematic is half our stores don’t even have registers that work right now.”

Employees worked to get backup credit card systems in place as the day went on. All of Jake’s nine stores close by 10 p.m. and everything was fine on Thursday night.

“This morning as the stores started to come online a 5 a.m. that’s when we started to discover it,” Bergeron said. “It’s been a tough morning.”

All of the stores use the same technology and computer systems, which has added to the frustration.

“We’ve been trying to understand how it can be random,” Bergeron said. “There’s so many computerized components involved, it’s very unpredictable how stores are being impacted.”

Mark Lilienthal, a spokesman for Mascoma Bank, said in an email that all of the bank’s systems “are working as normal.”

The city of Lebanon was running smoothly Friday, City Manager Shaun Mulholland said. “We don’t use that system so we’re fully operational, so no impacts on us,” he said.

The Lebanon Municipal Airport was similarly unscathed and Cape Air flights were arriving on time, said Airport Director Carl Gross.

“Right now we’re able to get you to Boston, but I would recommend that people check with their airlines to see how their connecting flights are doing,” Gross said. By 11 a.m., around half a dozen people were also able to pick up rental cars without any issues.

Liz Sauchelli can be reached at esauchelli@vnews.com or 603-727-3221.