A nonoperational mode of an unbalanced data link in which the secondary station is logically disconnected from the data link and therefore cannot transmit or receive information.; 一種非平衡數(shù)據(jù)鏈路的非運(yùn)行方式，在這種方式下，輔站和數(shù)據(jù)鏈路邏輯斷開， 因而不能傳送或接收信息。