Intel 05-2409-003 Manual Do Utilizador

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This section describes and illustrates the basic call model and state transitions for call control in 
asynchronous mode. This section also describes the process for call establishment for both inbound 
and outbound calls and call termination in the asynchronous mode. 

The procedures for establishing and terminating calls in the asynchronous mode are described in 
the following sections:

 

For E1, T1 and ISDN technologies, the Advanced Call Model includes call states associated with 
holding, retrieving and transferring calls. See 

 for more information. 

In general, when a function is called in asynchronous mode, and an associated termination event 
exists, the gc_Close( ) function should not be called until the termination event has been received. 
Otherwise, the behavior is undefined. 

This section describes how calls are established and shows call scenarios for asynchronous inbound 
calls. The following topics describe the processing of inbound calls in asynchronous mode:

 (for E1, T1, and ISDN technologies only) 

Figure 4 illustrates a Basic Inbound Call Model, which shows the call states associated with 
establishing a call in asynchronous mode. All calls start from a Null state. The call establishment 
process for inbound calls is shown in Figure 4. 

, on page 41 for a summary of the call 

state transitions.