Samsung Ubigate iBG3026 Configuration Manual page 454

CHAPTER 29. H.323 Gateway Management
Call Setup Procedure
Call Signalling basically follows the ITU-T Rec.H.323 recommendation; and
the call setup procedure can be generally divided into the case where Ubigate
iBG3026 is registered in gatekeeper, and where it is registered; and if H.323
gateway is registered in a gatekeeper, it can be divided into Direct Call
Signalling and Gatekeeper Routed Call Signalling depending on the call
model supported by a gatekeeper.
This section will discuss how Ubigate iBG3026 performs a call setup
procedure in dial-peer depending on the registered information(session target).
The H.225.0 SETUP message from the H.323 Endpoint registered as a session
target on dial-peer follows the call procedure illustrated in Figure 29.1.
In this case, call setup is done regardless of the existence of the gatekeeper to
interwork over H.323 network.
412
iBG3026
CallProceeding
Alerting or process
Call Signalling Messages
RAS Messages
Figure 29.1 Call Setup from a known H.323 Endpoint
a known H.323 endpoint
SETUP
Connect
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