Metro had “system-wide radio issues” Thursday morning that lasted for slightly less than an hour and caused delays on the Red Line, according to Metro’s chief spokesman Dan Stessel.

The delays were caused when a Glenmont-bound train “needed communications with Central Control and to do that they needed to use the telephone on the platform at Medical Center during the time the radio was not available.”

That stop caused a 12-minute delay in the Glenmont direction. All other lines continued to operate on time, Stessel said.

“It was a console in the rail control center where a foot pedal that is used to key the mike became stuck in the open position,” he said. “It wasn’t a problem with the network or infrastructure. It was a very simple issue.”

The problem began at 9 a.m. and was resolved by 10 a.m., he said.

Follow me on Twitter @postmetrogirl.