Intel 05-2409-003 Manual Do Utilizador

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Supervised transfers use the following Global Call API functions: 

gc_SetupTransfer( ) 

initiates a supervised transfer 

gc_CompleteTransfer( ) 

completes a supervised transfer 

gc_SwapHold( ) 

switches between the consultation call and the call pending transfer 

Unsupervised transfers use the following Global Call API function: 

gc_BlindTransfer( ) 

initiates and completes an unsupervised (one-step) transfer 

A supervised transfer begins with a successful call to the gc_SetupTransfer( ) function. The 
following steps describe how the transfer is completed: 

1. Successful call to the gc_SetupTransfer( ) function changes the state of the original call to the 

GCST_ONHOLDPENDINGTRANSFER state. 

2. A consultation CRN is allocated with the initial state of GCST_DIALTONE and is returned by 

the gc_SetupTransfer( ) function. 

3. The gc_MakeCall( ) function is called to establish a connection on the consultation call. The 

CRN returned by gc_MakeCall( ) is the same CRN as was returned by gc_SetupTransfer( ). 

4. The consultation call proceeds similarly to a singular outbound call proceeding through the 

GCST_DIALING and GCST_ALERTING (if enabled) call states. (See 

 for more information.) 

5. If the consultation call is successfully established, the state of the consultation call changes to 

the GCST_CONNECTED state, and the state of the original call remains unchanged. 

6. While the consultation call is in the GCST_CONNECTED state, the gc_SwapHold( ) function 

may be used to switch between the call pending transfer and the consultation call. 

7. A call to the gc_CompleteTransfer( ) function transfers the original call to the consultation 

call and internally drops both channels. 

8. The states of the original and the consultation call both change to the GCST_IDLE state upon 

receipt of the GCEV_COMPLETETRANSFER event. 

9. The application must call gc_ReleaseCallEx( ) for both of the calls to release the resources 

allocated for both channels. 

The consultation call may be terminated at any point in the process by the application or by the 
detection of a call disconnect from the network. 

The call state transitions that occur during a supervised transfer are shown in Figure 19 (which also 
shows the call state transitions for an unsupervised transfer).