A.rt-VBR(real-time Variable Bit Rate) B.ABR(Available bit rate) C.CBR(Constant Bit Rate) D.UBR(Unspecified Bit Rate) E.nrt-VBR(noreal-time Variable Bit Rate)
A.Modem B.Stream C.Local D.Statistics E.Topology
A.相關變化發(fā)生在MTP層 B.MTP-1、MTP-2改為SAAL C.MTP3改為了MTP3b D.支持的用戶部分不同 E.物理連接由E1中繼連接改為ATM(PVC)連接