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 Global Call IP Technology Guide — November 2007
479
Dialogic Corporation
8.3.22
gc_ReqService( ) Variances for IP
This function is only supported in asynchronous mode. 
The gc_ReqService( ) function can be used to register an endpoint with a registration server 
(gateway in H.323 or registrar in SIP). Function parameters must be set as follows: 
target_type 
GCTGT_GCLIB_NETIF 
target_ID 
An IPT board device, obtained by using gc_OpenEx( ) with a devicename parameter of 
“N_iptBx” 
service_ID 
Any valid reference to an unsigned long; must not be NULL 
reqdatap 
A pointer to a GC_PARM_BLK containing registration information. 
respdatapp 
Not used in asynchronous mode; set to NULL. 
mode 
EV_ASYNC 
The registration information that can be included is protocol-specific as described in Table 38 and 
Table 39, below. 
To set the protocol type, the following parameter element is inserted into the GC_PARM_BLK 
referenced by reqdatap:
IPSET_PROTOCOL
IPPARM_PROTOCOL_BITMASK 
and one of the following parameter data values:
IP_PROTOCOL_H323
IP_PROTOCOL_SIP
IP_PROTOCOL_H323 | IP_PROTOCOL_SIP
Note:
The default value for the protocol, when not specified by the application, is IP_PROTOCOL_H323.
Registration options are specified by inserting the following parameter element into the 
GC_PARM_BLK referenced by reqdatap
IPSET_REG_INFO
IPPARM_OPERATION_REGISTER
and one of the following parameter data values: 
IP_REG_SET_INFO – override an existing registration value 
IP_REG_ADD_INFO – add a registration value 
IP_REG_DELETE_BY_VALUE – remove a specific registration value (i.e., local alias or 
supported prefix only) 
IP_REG_QUERY_INFO – query a SIP Registrar for existing bindings (SIP only) 
See 
, on page 279 for more information.