A.MSC B.VLR C.HLR D.OMC
A.VLR B.MSC C.HLR D.OMC
A.開(kāi)放用戶(hù)的國(guó)際長(zhǎng)權(quán) B.提供三類(lèi)傳真業(yè)務(wù) C.數(shù)據(jù)異步通信9600bps業(yè)務(wù) D.數(shù)據(jù)同步通信9600bps業(yè)務(wù)