15
Call Backout Process
Call backout process
1) It is assumed that the calling party User A will terminate the call. RGW1 sends a
Notify message to MGC to report this event. MGC returns a response message of the
Notify command.
2) MGC generates a Modify command, indicating to RGW2 to play busy tone to User
B. The mode of both terminations is set to RecvOnly. RGW2 returns a response
indicating the success of the operation.
3) MGC directs RGW1 to remove both terminations from the context 1 and return
the statistics information of the ephemeral termination as the response.
4) User B hears busy tone and then hooks on. RGW2 reports a Notify message to
