Dialogic Global Call IP Benutzerhandbuch

47

Dialogic Corporation

The IPT network device (iptBxTy) and the IP Media device (ipmBxCy) can be opened 
simultaneously in the same gc_OpenEx( ) command. If a voice resource is available in the system, 
for example an IP board that provides voice resources or any other type of board that provides 
voice resources, a voice device can also be included in the same gc_OpenEx( ) call to provide 
voice capabilities on the logical channel. See 

page 476 for more information. 

Alternatively, the IPT network device (iptBxTy) and the IP Media device (ipmBxCy) can be 
opened in separate gc_OpenEx( ) calls and subsequently attached using the gc_AttachResource( ) 
function.

The IP Media device handle, which is required for managing Quality of Service (QoS) alarms for 
example, can be retrieved using the gc_GetResourceH( ) function. See 

, on page 263 for more information.

Figure 6 shows the relationship between the various types of Dialogic

®

 Global Call API devices 

when a single Host NIC is used.

An IPT board device is a virtual entity that corresponds to an IP address and is capable of handling 
both H.323 and SIP protocols. The application uses the gc_Start( ) function to bind IP addresses to 
IPT virtual board devices. Possible configurations are shown in Figure 7. The operating system 
must support the IP address and underlying layers before the Dialogic

®

 Global Call API 

application can take advantage of the configurations shown in Figure 7. Up to eight virtual IPT 
boards can be configured in one system. For each virtual IPT board, it is possible to configure the 
local address and signaling port (H.323 and SIP), the number of IPT network devices that can be 

IP

Network

DTI

network

device

PSTN

IPM

media

device

(on board)

IPT

network

device

(on host)

CT Bus

Global Call line device
(with media and voice 

devices optionally

 attached)

H.323 or SIP 

Call Control

RTP

RTCP

Host NIC
(IPT board device)

dxxx

voice

device

Note:  The dxxx voice device can 
be on the same board as the IPM 
media device or on a different board.