电话机上的自动拨号按钮提供用于外部号码、内部通信号码或功能代码的一次拨号。
An Autodial button on a phone provides one-touch dialing of outside Numbers, intercom Numbers, or feature codes.
当电话机没有“接通”时，各种线路按钮激活自动将第一根线路置于保留状态，不需要使用特殊的“保留”按键。
As long as a phone does not go "on-hook," activation of various line pushbuttons will automatically place the first line on hold without the use of a special "hold" button.
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