GC_CALLACK_BLK

---

typedef struct {
    unsigned long type;   /* type of a structure inside following union */
    long rfu;             /* will be used for common functionality */
    union {
        struct {
            int       accept;
        } dnis;
        struct {
            int       acceptance;
            /* 0x0000 proceeding with the same B chan */
            /* 0x0001 proceeding with the new B chan */
            /* 0x0002 setup ACK */
            LINEDEV  linedev;
        } isdn;
        struct {      
           int       info_len;
           int       info_type; 
        } info;
        struct {
            long     gc_private[4];
        } gc_private;
    } service;           /* what kind of service is requested */
                         /* related to type field */
} GC_CALLACK_BLK, *GC_CALLACK_BLK_PTR; 

Description

The GC_CALLACK_BLK structure contains information provided to the gc_CallAck( ) function regarding the operation to be performed by this function. When using the gc_CallAck( ) function in E-1 CAS environments, the dnis service structure specifies the number of additional DDI digits to be acquired.

Field Descriptions

The fields of GC_CALLACK_BLK are described as follows:

type

specifies the type of service requested. The type field identifies the type of structure inside the service union:

• GCACK_SERVICE_INFO

  used to request more info

• GCACK_SERVICE_PROC

  used when call is proceeding

• GCACK_SERVICE_DNIS

  used to request DNIS (deprecated, use GCACK_SERVICE_INFO)

• GCACK_SERVICE_ISDN

  used when ISDN call is proceeding

See Table 17 for descriptions of the fields in each type of structure.

Note: The GCACK_SERVICE_DNIS and GCACK_SERVICE_ISDN structures are deprecated in this software release. Use the GCACK_SERVICE_INFO or GCACK_SERVICE_PROC structure instead.

rfu

reserved for future use; must be set to 0

service

kind of service requested; related to type field. Not used for the GCACK_SERVICE_PROC service type.

gc_private[4]

for internal use by Global Call

Table 17. Service Type Data Structure Field Descriptions 

Service Type	Data Structure Field in Union	Description
GCACK_SERVICE_DNIS (deprecated)	dnis	structure containing the information needed for collecting DDI digits
	dnis.accept	indicates type and number of digits to be requested. Set to the number of DDI digits to be collected. See the Global Call ISDN Technology User's Guide for technology-specific information.
GCACK_SERVICE_INFO	info	structure containing type and length of information requested
	info.info_type	type of information requested. The possible values are: DESTINATION_ADDRESS request more DNIS ORIGINATION_ADDRESS request more ANI
	info.info_len	length of the information requested (typically number of digits)
GCACK_SERVICE_ISDN (deprecated)	isdn	structure containing information for ISDN procedures supported by this function. See the Global Call ISDN Technology User's Guide for more details.
	isdn.acceptance	indicates type of message to be sent to network. Valid values are: CALL_PROCEEDING send Proceeding message CALL_SETUP_ACK send Setup Acknowledge message
	isdn.linedev	the new Global Call line device to be used for the call. If set to 0, the channel requested by the network will be used.

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