The Oakland-Alameda County Coliseum is about to become the Ring Central Coliseum, as the longtime home of the Oakland A’s and Raiders undergoes yet another name change.

Under the deal, the Belmont communications firm will pay $1 million a year for next three years, with an option for a fourth year, for the right to hang its name atop the stadium, which can seat more than 50,000 for football.

“We have a contract that we are finalizing right now,” said Coliseum Authority Executive Director Scott McKibben. “The lawyers are tying up last-minute loose ends, but the goal is to bring it to the authority for a vote Friday.”

Ring Central, which specializes in corporate communication networks, replaces Overstock.com — or O.Co — which pulled out of its $1.45 million-a-year deal with the Coliseum after the Raiders announced plans in 2016 to leave Oakland for Las Vegas.

The deal also comes as the A’s are working to build a new ballpark on the Oakland waterfront.

“We have been working on this for a while now, but it was delayed over the uncertainty of the future of the stadium,” McKibben said.

Though the A’s will be playing at the Coliseum for another few years, that tenure could stretch out indefinitely if their new ballpark doesn’t pan out.

The reduced price on the new naming deal was based on the idea that only the A’s would be playing at the stadium.

However, the Raiders have since negotiated a one- to two-year extension of their Coliseum lease while their new Las Vegas stadium is being built, so Ring Central gets the added boost of having their name visible at Raiders games for free.

On the upside, the authority will get the full $1 million, whereas in the past they split the revenue with the Raiders — the A’s got nothing then or now.

If the authority directors approve the deal Friday, the name change would go into effect immediately — although it will likely take another two months for the new signs to go up.

Meanwhile, the authority is also looking for a new name to go up on the adjacent Oracle Arena when the Golden State Warriors exit for their new digs in San Francisco.

“The naming rights for Oracle belong to the Warriors for as long as they play in the arena,” McKibben said.

When the Warriors officially exit on June 30, it will be a jump ball for the naming rights, although without a professional level team, those rights could be a tougher sell.

“We will start marketing the arena naming rights in July,” McKibben said.

Ring Central could not be reached immediately for comment.

San Francisco Chronicle columnist Phillip Matier appears Sundays and Wednesdays. Matier can be seen on the KPIX-TV morning and evening news. He can also be heard on KCBS radio Monday through Friday at 7:50 a.m. and 5:50 p.m. Got a tip? Call 415-777-8815, or email pmatier@sfchronicle.com. Twitter: @philmatier