Cisco WS-X4604-GWY - VoIP Gateway Especificaciones descargar pdf (Pagina 141)

6-11

Cisco IP Telephony Network Design Guide

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Chapter 6 Multisite WAN with Distributed Call Processing

Call Admission Control

Interaction Between Cisco CallManager and Gatekeeper

Cisco CallManager sends a Registration Request (RRQ) to register itself as a

single VoIP gateway. Currently the Cisco IOS Multimedia Conference Manager

(MCM) cannot accept E.164 address ranges within an RRQ, but you can configure

the address ranges statically on the gatekeeper as shown in the “Gatekeeper

Configuration” section on page 6-9. Figure 6-6 illustrates the communication

stream between Cisco CallManager and the gatekeeper.

Figure 6-6 Cisco CallManager Communicating with a Gatekeeper

For purposes of failover and backup, more than one Cisco CallManager from a

cluster can register with the gatekeeper. You can assign the gatekeeper to a

Cisco CallManager group to define which Cisco CallManager in the group is the

primary and which are backups. If the primary Cisco CallManager fails to

communicate with the gatekeeper, the gatekeeper removes its registration and

establishes communication with the secondary Cisco CallManager in the group.

Once the gatekeeper receives an RRQ from a Cisco CallManager, it issues a

Registration Confirm (RCF) and adds that Cisco CallManager to its list of

registered devices. The gatekeeper knows about all the Cisco CallManagers that

Site 1

IP WAN

Cisco

3600

x1111

Zone 1

RRQ

RCF

PSTN

IP WAN

Cisco CallManager registers

as a single VoIP gateway.

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Cisco IOS

Gatekeeper

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