A.EIT1F B.CE1B C.CE1BB D.EIGMF
A.bANdwidTh dOwNsTreAM MAxiMUM B.bANdwidTh UPsTreA MAssUred C.bANdwidTh UPsTreA Mfixed D.bANdwidTh UPsTreAM MAxiMUM
A.數(shù)據(jù) B.語(yǔ)音 C.TDM D.CES