Instructs the BRI service to stop blocking calls.

DWORD briUnBlockCalls ( CTAHD ctahd )

ctahd CTA context handle returned by ctaCreateContext.

• SUCCESS
• CTAERR_INVALID_CTAHD
• CTAERR_INVALID_STATE

• BRIEVN_CALLS_UNBLOCKED
  The request to unblock the line is granted.

This function instructs the BRI service to stop blocking calls. When briBlockCalls is called, a transition to the blocking state occurs and calls are blocked. briUnBlockCalls is called to exit this state, which results in a transition from the blocking state to the idle state. When this transition occurs, the BRI service generates BRIEVN_CALLS_UNBLOCKED.

Once the CTA context enters the idle state, it can receive or place new calls.

If briBlockCalls is called and briUnBlockCalls is called before the protocol is able to start blocking calls, no event is received.

Refer to Chapter 4 for a detailed explanation of call control.

briUnBlockCalls

int myUnBlockCalls( CTAHD ctahd )
{
 CTA_EVENT event;

    if( briUnBlockCalls( ctahd ) != SUCCESS )
        return MYFAILURE;

    do 

    {
        myGetEvent( &event );           /* see ctaWaitEvent example */
        switch( event.id )
            {
            /* ... */
            }
    } while( event.id != BRIEVN_CALLS_UNBLOCKED );
    return SUCCESS;
}