Dialogic Global Call IP Benutzerhandbuch

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Dialogic Corporation

This alternative response to media session proposals is enabled using the gc_SetConfigData( ) 
function, passing it a GC_PARM_BLK that includes the following parameter:

IPSET_CONFIG

IPPARM_1PCC_REJECT_VIDEO

value = not used

Once this alternative rejection mode has been enabled, the setting remains in effect until the library 
is stopped and the application exits.

The following code snippet illustrates how applications would enable the optional rejection mode: 

gc_util_insert_parm_val(&pParmBlock, IPSET_CONFIG, IPPARM_1PCC_REJECT_VIDEO, sizeof(int), 0);
long t = 0;
int  rc = gc_SetConfigData(GCTGT_CCLIB_NETIF,
                           boarddev,
                           pParmBlock,
                           0,
                           GCUPDATE_IMMEDIATE,
                           &t,
                           EV_ASYNC);

When using the H.323 protocol, the application can configure whether the Proceeding message is 
sent under application control (using the gc_CallAck( ) function) or automatically by the stack. 
The default behavior is for the stack to send Proceeding automatically. 

The generation of the Proceeding message is configured using the gc_SetConfigData( ) function. 
To configure the generation of the Proceeding message, the GC_PARM_BLK that is passed to the 
function must contain the following parameter element:

GCSET_CALL_CONFIG 

GCPARM_CALLPROC 
Possible values: 

GCCONTROL_APP – The application must use gc_CallAck( ) to send the Proceeding 
message. This is the default. 

GCCONTROL_TCCL – The stack sends the Proceeding message automatically. 

To support large numbers of channels, the Dialogic

®

 Global Call API library must perform all 

operations in asynchronous mode. To support this, an extension function variant allows the retrieval 
of a parameter as an asynchronous operation. 

The retrieval of call-related information is a four step process:

1. Set up a GC_PARM_BLK that identifies which information is to be retrieved. The 

GC_PARM_BLK includes GC_PARM_DATA blocks. The GC_PARM_DATA blocks specify 
only the Set_ID and Parm_ID fields, that is, the value_size field is set to 0. The list of 
GC_PARM_DATA blocks indicate to the call control library the parameters to be retrieved.