Intel 05-2409-003 사용자 설명서

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one call may exist on a given line). A line device can have a maximum of 20 CRNs associated with 
it. At any given instant, each CRN is a unique number within a process. After a call is terminated 
and the gc_ReleaseCallEx( ) function is called to release the resources used for the call, the CRN 
is no longer valid. 

The CRNs and LDIDs assigned by the Global Call API library can not be shared among multiple 
processes. These assigned CRNs and LDIDs remain valid only within the process invoked. That is, 
for call control purposes, you should not open the same physical device from more than one 
process, nor from multiple threads in a Windows environment. Unpredictable results may occur if 
this advice is not followed. 

A target object provides a way of identifying a particular entity that is maintained by a specific 
software module. In API function calls, the target object is specified by a pair of parameters, the 
target_type and target_ID: 

target_type 

Identifies the kind of software module and the entity that it maintains. For example, the target 
type GCTGT_GCLIB_CHAN represents the Global Call Library and a channel entity that it 
maintains. 

target_ID 

Identifies the specific target object, such as a line device ID (LDID), which is generated by 
Global Call at runtime. 

Table 2 shows the combinations of physical or logical entities and software module entities that can 
make up a target type (target_type). 

The possible software modules include: 

GCLib 

CCLib 

Protocol 

GCLib

S

S

S

S

CCLib

S

S

S

S

Protocol

SV

SV

SV

Firmware

SV

SV

S = Supported
SV = Supported with Variances, see the appropriate Global Call Technology Guide for more information.