单项选择题
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.数据 B.语音 C.TDM D.CES