6.4.2 IPCallControl::Null State

The application waits for a GCEV_OFFERED or USR_MAKECALL event. In the case of GCEV_OFFERED, the application calls getCallAddrInfo( ) to get the destination and originator from the IP message and set the member variables. The application then calls getIncomingCallInfo( ) which calls gc_Extension( ) to request extension information from the IP. If the function fails, the application does not wait for the complete message and the state transitions to Connected. Otherwise, the application calls callAck( ) and the state transitions to getCallInfo.

In the case of USR_MAKECALL, the application calls makeCall( ) and the state transitions to makingCall.

If the application receives a GCEV_DISCONNECTED event, it calls getResultValue( ) to get the disconnect reason and then calls dropCall( ). If the dropCall( ) function fails, the application calls resetLineDevice( ) to reset the line device and the state transitions to Init. Otherwise, the state transitions to Dropping.

If the application receives a USR_DISCONNECT event it retrieves the DropReason from the EventData and calls dropCall( ). If the dropCall( ) function fails, the application calls resetLineDevice( ) to reset the line device and the state transitions to Init. Otherwise, the state transitions to Dropping.

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