A.F-CCCH B.F-CACH C.F-QPCH D.F-BCCH E.F-SCCH
A.NAS B.BSS C.MS D.PDSN
A.光纖/物理層 B.E1/光纖 C.物理介質(zhì)子層(PM)/傳輸匯聚子層(TC. D.物理層/適配層