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User Manual - Configuration Guide (Volume 3)
Versatile Routing Platform
Chapter 4
GK Client Configuration
4-1
Chapter 4 GK Client Configuration
4.1 Overview of GK Client
IP telephone uses Internet as the medium to transmit voice information. IP telephone
GateWay (GW for short) lies between Public Switched Telephone Network (PSTN) and
Internet access sites. It compresses the voice signal on PSTN network and transports it
to the opposite end IP telephone gateway via Internet. Meanwhile, it receives the IP
packet from Internet and decompresses it to restore to voice signal of PSTN network.
The implementation of IP telephone function on router expands the function of the
router, which indicates the trend of the gradual expansion from data service to voice
service.
As defined in ITU-T recommendation, GateKeeper (GK for short) is a H.323 entity that
can provide such functions as address translation, admission control, bandwidth
control and management, area management, security check, call control signaling and
call management, and sometimes routing control and billing functions, for the H.323
terminal, GW or some Multipoint Control Unit (MCU) of Local Area Network or Wide
Area Network. In an area managed by GK, to all the calls, GK not only provides call
service control and also serves as the central control point.
According to the composition of the entity that implements complete GK function, it can
be classified into Client end and Server end. Taking router as its hardware medium, GK
Client entity generally performs the configuration of IP voice gateway function for the
router through the command line interface, and interacts with GK Server by RAS
signaling, thus enable GK Server to provide services such as address translation,
admission control, bandwidth management, and the management of router IP voice
gateway. GK Server can be implemented on SUN workstation or routers.
4.2 Configuration of GK Client
4.2.1 Configuration Task List of GK Client
The configuration tasks of GK Client include:
z
Configure one interface as H.323 gateway interface
z Activate or deactivate GK Client function
z Configure alias of the gateway
z
Configure the GK Server name and address corresponding to the gateway
z Configure tech-prefix
z Configure GK interconnection mode
4.2.2 Configuring One Interface as H.323 Gateway Interface
The router communicates with GK Server as voice gateway device. It needs to specify
the interface that communicates with GK server for the router. The interface specified is
H.323 gateway interface. Ethernet port, serial port, etc., can all become H.323 gateway