He hit the button again and called the main switchboard.

I called right from the hospital's main switchboard, while they clustered around me.

"Many dozens more are calling our main switchboard," he said.

Quick, shut off all power at the main switchboard forward.

For all other inquiries please call the main Guardian switchboard on 020 7278 2332.

For all other inquiries please call the main Guardian switchboard on 020 3353 2000.

The main switchboard at the traffic department is 1787-2222.

An operator at the main switchboard answered and asked for an extension.

Within a minute the main switchboard was so demolished that no one could ever repair it again.

She was already around at the main switchboard off the foyer, plugging in her call herself.