Avaya BCM 4.0 Networking Guia de Configuração Página 161

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Chapter 9 VoIP trunk gateways 161
BCM 4.0 Networking Configuration Guide
A single gatekeeper manages a set of H.323 endpoints. This unit is called a Gatekeeper Zone.
A zone is a logical relation that can unite components from different networks (LANS). These
Gateway zones, such as the BCM, are configured with one or more alias names that are
registered with the gatekeeper. The gatekeeper stores the alias-IP mapping internally and uses
them to provide aliases to IP address translation services. Later, if an endpoint IP address
changes, that endpoint must re-register with the gatekeeper. The endpoint must also re-register
with the gatekeeper during the time to live (TTL) period, if one is specified by the gatekeeper.
Refer to the gatekeeper software documentation for information about changing IP addresses.
Gatekeeper call scenarios
This section explains how a call would be processed for the two types of gatekeeper
configurations. Figure 49 shows a network with three BCMs and a gatekeeper.
Figure 49 BCM systems with a gatekeeper
This example explains how a call from DN 321 in Ottawa would be made to DN 421 in Santa
Clara. It assumes that call signaling is set to Gatekeeper Resolved and no pre-granted
AdmissionRequest (ARQ) has been issued:
1 BCM Ottawa sends an ARQ to the gatekeeper for DN 421.
2 The gatekeeper resolves DN 421 to 10.10.10.19 and returns this IP in an AdmissionConfirm to
the BCM Ottawa.
Note: A gatekeeper may help to simplify IP configuration or the BCM dialing
plan; however, it does not simplify the network dialing plan.
gatekeeper
IP:10.10.10.17
IP:10:10:10:18
IP:10:10:10:19
IP:10:10:10:20
DN 521
DN 421
DN 321
IP network
CCS 4.0 Santa Clara
CCS 4.0 Ottawa
CCS 4.0 Calgary
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