关断电源，在重新供电时按下用户按钮(离板的外边缘最近的按钮)。

Remove power, then hold down the user button (closest to the outside of the board) while reapplying power.

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它的触摸键盘和大按钮很容易用戴手套的手或大手指和键顶部使用可快速访问激活免提通话和挂断电话。

Its tactile keypad and large buttons are easy to use with gloved hands or large fingers and top keys provide quick access to activate the speaker phone and end calls.

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此外只有有权限的人才能使用的紧急按钮，切断电源而阻止过往车辆。

It also features an emergency trip button that authorized personnel can use to cut power to the track to halt an oncoming train.

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