Review Questions
| 1 | 
			 What role does the call agent play when using an MGCP gateway?  | 
		
| 2 | 
			 List the control messages that MGCP uses.  | 
		
| 3 | 
			 How does MGCP Backhaul function?  | 
		
| 4 | 
			 What three commands do you need to enable MGCP on a router and identify Cisco CallManager as its call agent?  | 
		
| 5 | 
			 Why is there a need for DTMF relay in a VoIP network, regardless of the gateway protocol used?  |