Time slots associated with two or more digital circuits switched in parallel through a digital exchange for use on the same call to provide a wideband service.; 通過(guò)數(shù)字交換機(jī)并行交換的兩個(gè)或多個(gè)數(shù)字電路相關(guān)的時(shí)間槽,用于同一呼叫中以提供 寬頻帶服務(wù)。