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                                    單項(xiàng)選擇題
                                    
    GSM網(wǎng)絡(luò)中，哪個網(wǎng)絡(luò)單元完成呼叫建立和控制功能？（）
    
                                
    
                                
                                    
    
	A.MSC
    
	B.BSC
    
	C.HLR
    
	D.VLR
    

    
                                
                                
                                
    
                                    
                                    
                                
    
                                

                        
    
                    
                
    

                
                    
                    

            
    
            
    
                
            
    
        
    
    
    
    

    

    
    
    
        
    
            
    
                
                
    

                
    
            
    
        
    
    
    

    

    
    
    
        
        
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