Dialogic Global Call IP Benutzerhandbuch

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opened simultaneously, etc. See 

more information on how to configure IPT board devices.

Once the IPT board devices are configured, the application can open line devices with the 
appropriate IPT network device (IPT channel) and optionally IP Media device (IPM channel). 

The gc_SetConfigData( ) function can be used on an IPT board device to apply parameters to all 
IPT channels associated with the IPT board device. The application can use the 
gc_AttachResource( ) and gc_Detach( ) functions to load balance which host NIC makes a call 
for a particular IP Media device (IPM channel). It is also possible that the operating system can 
perform load balancing using the appropriate NIC for call control as shown in Figure 7, 
configuration D. 

The gc_ReqService( ) function is used on an IPT board device for registration with an H.323 
gatekeeper or SIP registrar. See 

for more information.

Dialogic

®

 Global Call API supports three types of IPT network devices:

H.323 only (P_H323 in the devicename string when opening the device)

A. Multiple IP Addresses Assigned

 to the Same Host NIC

IPT Channels

IPT Channels

IPT Board 1

IPT Board 2

IPT Address 1 IPT Address 2

Host NIC

B. Multiple IP Addresses Belonging

 to Different Host NICs

IPT Channels

IPT Channels

IPT Board 1

IPT Board 2

IPT Address 1 IPT Address 2

Host NIC 1

Host NIC 2

C. Multiple IPT Boards Using

the Same IP Address

IPT Channels

IPT Channels

IPT Board 1

IPT Board 2

IP Address 1

Host NIC

D. Multiple NICs Abstracted into One

IP Address by the OS

IPT Channels

IPT Channels

IPT Board 1

IPT Board 2

IP Address 1

Host NIC 1

Host NIC 2

Note: IPT Board 1 and IPT Board 2
          must have different port numbers.