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Cisco IP Telephony Network Design Guide

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Chapter 3 Cisco CallManager Clusters

Cisco CallManager Redundancy

Figure 3-5 Interregion Configuration Screen

The exact clustering model—and hence device pools used—is driven by the

deployment model. The typical device pool configurations, however, have the

following characteristics:

• Single-site cluster with no WAN voice interconnectivity

–

Device pools are configured based only on Cisco CallManager

redundancy groups.

• Single-site cluster with WAN voice interconnectivity

–

Device pools are configured as above, but with the addition of regions for

codec selection. Each cluster could have a G.711 and G.729 region per

Cisco CallManager redundancy group.

–

Total device pools = regions x Cisco CallManager redundancy groups.

• Multi-site WAN with centralized call processing

–

Only a single Cisco CallManager redundancy group exists. However, a

G.711 region and a G.729 region are required per location. This permits,

for example, intrabranch calls to be placed as G.711 and interbranch calls

to be placed as G.729.

–

Total device pools = number of sites x regions.

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Cisco WS-X4604-GWY - VoIP Gateway Especificaciones Pagina 83