There is a Question, which says there are two routers( Residential Gateways) connected to each other thru CALL AGENT across the IP Network so,...........
At what point does the MGCP call agent turn over to the residential gateways the setup of the call path?
A.) After the call agent has been notified that an event has occurred at the source residential gateway.
B.) After the call agent has been notified of an event and has instructed the source residential gateway to create a
C.) The call agent is never out of the call path setup.
D.) After the call agent has sent a connection requests to both the source and destination and has relayed a
modify-connection request to the source so that the source and destination can set up the call path.
E.) After the call agent has forwarded session description protocol information to the destination from the source
and has sent a modify connection to the destination and a create-connection request to the source.
In Testking Correct Answer is "C"
In Actual Test Correct Answer is "D"
If we say that role of the Call Agent is defined till it makes the two endpoints communicate to each other ( what is called as MDCX- modify Connection ).
But what when, at the Conclusion of Call, i.e. one of the endpoints recognizes an On-hook Transition, then in that case again Call Agent has to send the DLCX ( Delete Connection ) to the particular gateway for the termination of the call........so isn't it that CallAgent is never out of the call path setup as per the above explanation.
So am bit confused,what could be the correct answer for this?If So,Why?