A.1.8MBPS B.1.2MBPS C.3.1MBPS D.6MBPS
A.A B.Um C.Abis D.SMC
A.認(rèn)證授權(quán)計(jì)費(fèi) B.分組核心網(wǎng) C.傳輸網(wǎng) D.分組數(shù)據(jù)服務(wù)節(jié)點(diǎn)