A.控制框BCTC B.資源框BGSN C.分組交換框BPSN D.基帶框BABN
A.RGUM1 B.RGUM2 C.RUIM1 D.RUIM2
A.語音業(yè)務(wù) B.GPRS業(yè)務(wù) C.電路型數(shù)據(jù)業(yè)務(wù) D.短信業(yè)務(wù)