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對(duì)于一個(gè)正常的移動(dòng)臺(tái)主叫流程,下面的信令流程先后次序正確的是()

A.OriginationMessage->CMServiceRequest->Allocation->Establish->AssignmentComplete->TchPreamble
B.OriginationMessage->CMServiceRequest->TchPreamble->Establish->AssignmentCompleteAllocation
C.OriginationMessage->CMServiceRequest->Establish->Allocation->TchPreamble->AssignmentComplete
D.OriginationMessage->CMServiceRequest->Establish->AssignmentComplete->Allocation->TchPreamble

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