Volunteer call center operators were being trained Thursday to take tens of thousands of calls from New Hampshire residents eager to get vaccinated against the coronavirus, while a registration website stood ready to handle 100,000 visitors at once.

Registration will open at 8 a.m. Friday for the approximately 325,000 people in phase 1B of the state’s vaccination plan. That includes anyone age 65 or older, people with at least two qualifying medical conditions, corrections workers, and staff and residents of residential facilities for people with intellectual or developmental disabilities.

The easiest way to register will be via the vaccine.nh.gov website. Those who can’t schedule an appointment online can call the state’s 2-1-1 hotline. More than 300 state employees have volunteered to staff the phones, but wait times of an hour or more are possible, Gov. Chris Sununu said.