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.
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.
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。
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