The roll-out of expanded gambling in Connecticut is set to take a big step next week as online gambling launches on a limited basis for bettors to gamble on their phones, tablets and other online devices.

The Department of Consumer Protection on Friday notified the Connecticut Lottery Corp., Mohegan Tribe and Mashantucket Pequot Tribe — owners and operators of the state’s two casinos — they may begin a seven-day limited launch beginning at 3 p.m. Tuesday.

It follows the start of sport betting at the casinos as part of expanded gambling in Connecticut approved in legislation this year by Gov. Ned Lamont and the General Assembly.

“After more than a decade of advocacy and negotiation, statewide sports betting and iGaming is finally coming to Connecticut,” Rodney Butler, chairman of the Mashantucket Pequot Tribal Nation, said in an email. “This has been a remarkable implementation schedule, from legislative approval in the spring to retail and online gaming this fall.

“We’ve made it to the finish line and we’re excited to finally launch.”

Once the so-called “soft launch” is complete, online gambling will open statewide, the Department of Consumer Protection said.

The legislation Lamont signed in May ushered in the broadest expansion of gambling in Connecticut since the Mohegan Sun and Foxwoods Resort Casino opened in the 1990s.

Sports betting was launched at the two casinos on Sept. 30. The final part of the new law is the opening of 15 Connecticut Lottery sites for gamblers to bet on sports teams and play other games. The Connecticut Lottery Corp. has not announced when the sites will begin operating.

For the Lottery Corp., the scope of the soft launch of online gambling allows betting only in Connecticut and limits gambling to 750 online accounts during the seven days. Hours also are limited for gambling before a 24-hour cycle is permitted.

For the casinos, the soft launch will not include live dealer or peer-to-peer online casino games. Betting will be permitted on about 100 games approved by the consumer protection agency.

FanDuel and DraftKings, the sports betting partners of Mohegan Sun and Foxwoods, and Rush Street Interactive, the approved platform working with the Lottery Corp., are authorized to begin establishing customer accounts for the 750 individuals that will take part in the soft launch.

With its digital reach by phones, computers and apps that will provide access to a multitude of games, online gambling is expected to pull in far more revenue than sports betting. Connecticut’s two casinos took a big financial hit during the worst of the COVID-19 pandemic, shutting from mid-March 2020 to early June and reopening on a limited basis.

Negotiations for expanded gambling between Lamont and the tribes focused on changing the compacts with the Mashantucket Pequots and Mohegans that gave them exclusive gambling rights in exchange for a 25% tax on slot machine revenue.

The revised gambling rules signed into law calls for an 18% tax for the first five years on online commercial casino gambling, followed by a 20% tax for at least the next five years and a 13.75% tax on sports wagering and expansion of iLottery and Keno through the Connecticut Lottery Corp., including the sale of draw tickets online.

Stephen Singer can be reached at ssinger@courant.com.