At what point does the MGCP call agent release the setup of the call path to the residential gateways?
A.
after the call agent has been notified that an event 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 connection
C.
does not release call path setup
D.
after the call agent has sent a connection request 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
Explanation:
Below is the call flow between two voice gateway through a MGCP Call Agent
The MGCP call agent releases the setup of the call path to the residential gateways when the conversation begins. After sending the Modify Connection (MDCX), the two gateways have enough information to start the conversation so the duty of the Call Agent finishs.
