switched multimegabit data service 多兆比特?cái)?shù)據(jù)交換業(yè)務(wù); 多兆位數(shù)據(jù)交換業(yè)務(wù); 交換式多兆位數(shù)據(jù)傳送業(yè)務(wù); 交換式多兆位數(shù)據(jù)服務(wù); 交換兆位數(shù)據(jù)服務(wù)
smds switched multimegabit data service 多兆位數(shù)據(jù)交換業(yè)務(wù); 交換式多兆比特?cái)?shù)據(jù)服務(wù); 交換兆比特?cái)?shù)據(jù)業(yè)務(wù); 切換式多兆位數(shù)據(jù)服務(wù)(通過電話網(wǎng)實(shí)現(xiàn)的); 轉(zhuǎn)換多兆位數(shù)據(jù)服務(wù)