In data communication,the addition of equipment to a leased voice-grade channel to provide minimum values of line characteristics required for data transmission. 在數據通信中，在租用的音頻通道上增加設備以提供數據傳輸所要求的線路特性的最小值。
In this mode, channel information is ignored and the equipment responds to data in any channel polyphonically.Mode2? 在該模式下，通道信息被取消，設備對任何通道的數據以多聲道的方式做出反應。
This configuration often provides stunning multichannel sound from ordinary stereo recordings. 該結構常常能夠從普通立體聲錄音中提煉出令人驚訝的多聲道音響效果。
