Patton electronic SmartNode 4110 Series manual Gateway between IP and CS contexts

SmartWare Software Configuration Guide 45 • H.323 gateway configuration

Introduction

This chapter provides an overview of the H.323 gateway and describes the tasks involved in its configuration.

A gateway is always needed when communication is required between different networks. A gateway provides:

•Data format translation, e.g. audio and video CODEC translation

•Control signaling translation, e.g. call setup and tear-down functionality on both sides of a network.

The gateway manages connections between two different contexts, essentially functioning as a protocol con- verter. Additionally it also contains general gateway configuration parameters.

One type of gateway is the H.323 gateway and is an implementation of the ITU-T H.323 Version 4 standard. The H.323 gateway has bindings to interfaces on the two different contexts. The CS Context has H.323 CS interfaces and the IP context has IP interfaces. The H.323 CS interfaces are explained in detail in chapter 38, “H.323 interface configuration” on page 431.

The H.323 interfaces in the CS context must be explicitly bound to a H.323 gateway instance, and the H.323 gateway must be bound explicitly to an IP interface in the IP context. Figure 77 illustrates the relationship of the H.323 gateway to the contexts and their interfaces.

H.323

Gateway

bind gateway

bind interface

H.323

Interface

Context IP	Context CS
“router”	“switch”

IP interfaces

Figure 77. Gateway between IP and CS contexts

SmartWare currently supports only one instance of the H.323 gateway. The default name of the H.323 gate- way is h323. The H.323 gateway is enabled by default.

Introduction 547