The court said arguments would be heard on May 4, 5, 6, 11, 12 and 13, and it listed the 10 sets of arguments it would hear. But it did not say which cases would be heard when. That would depend, the court said, on “the availability of counsel.”

Other courts have been hearing oral arguments online, with video. The Supreme Court stopped short of taking that step.

Still, Monday’s announcement was a significant move for a court that has never allowed camera coverage or live audio. On 27 occasions over the last two decades, it has released same-day audio. But its usual practice is to release transcripts within hours but audio only at the end of the week.

The court had already postponed 20 arguments that had been scheduled for March and April, citing the coronavirus pandemic. Monday’s announcement listed 10 sets of cases to be argued in May, which included most of the major ones. The remaining arguments, including a $9 billion copyright dispute between Google and Oracle, will be rescheduled for the court’s next term, which begins in October.

Hearing arguments on the phone will present some challenges for the justices, who frequently interrupt lawyers and talk over one another. They may have set some ground rules, like asking questions in order of seniority.