Current position：Support >> FAQ
　 What is VoIP?  
　 What is the difference between FXS and FXO?  
　 What is VoIP-to-PSTN Calls?  
　 What is intelligent route ?  
　 What is 3-in-1 feature?  
　 What is FXO & FXS switching?  
　 What is FXO hop-on ?  
　 What is FXO hop-off ?  
　 What is FXO pin hop-on ?  
　 What is FXO pin hop-off ?  
　 Does cng gateway support auto provisioning?  
　 Does CNG gateway support automatic configuration?  

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