The following methods will help you tell whether your system has been targeted by toll fraud hackers:
        
            
            
            
            
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                In the Global Administrator Management Console, check the Call Log in User/Group Management daily for multiple logon attempts.  | 
            
        
        
            
            
            
            
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                A failed logon attempt will show as “logon - Abandoned”.    | 
            
        
        
            
            
            
            
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                A successful fraudulent logon will typically show many long distance or international calls placed subsequently from that extension.  | 
            
        
        
            
            
            
            
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                Check your phone bills carefully for international numbers or long distance numbers that you do not recognize. | 
            
        
        
            
            
            
            
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                Watch your Trunk Monitor (available on the Diagnostics tab of the Global Administrator Management Console) for sudden bursts where every line is busy with people trying to log on. |