It is used with the DCN-FVU voting unit, but it can also be used for other flush mounted units such as the DCN-FCS Channel selector for 32 channels.

• 它可以与DCN-FVU投票装置配合使用，但是也可用于其他嵌入式安装装置，例如DCN-FCS通道选择器（32通道）。