It's an electronic button set to a different frequency than the wire.

He reached out and pressed a small button set into the side of the desk.

He pressed a button set in the wall, and the doors rumbled open.

In its place are three buttons set into the right hand cab pillar.

She had risen and pressed a button set in the wall.

It was a single small black button set in a red plaque.

Then he turned and pressed the button set in the wall.

His hand reached for a red button set into the material of the console.

No dial, just a button set in a slender post.

There was a button set into a pole at the gate, positioned for an easy reach from a truck.