Cisco Cisco IP Contact Center Release 4.6.2 Leaflet

12-8

Cisco Unified Contact Center Enterprise 7.5 SRND

Chapter 12 Bandwidth Provisioning and QoS Considerations

Unified CCE Network Architecture Overview

shows a scenario in which two different Unified CM clusters provide service to phones at

the same remote site. This may occur if a Unified CM cluster is assigned to handle an IP call center. In
the scenario, two users at the same office are serviced by different clusters. RSVP offloads the bandwidth
calculation responsibilities of Unified CM to the network routers.

Figure 12-2

Example of Different Unified CM Clusters

For more information on Unified CM RSVP, refer to the Cisco Unified Communications SRND Based
on Cisco Unified Communications Manager, available at

http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_implementation_design_guides
_list.html

Traffic Flow

This section briefly describes the traffic flows for the public and private networks.

Public Network Traffic Flow

The active PG continuously updates the Central Controller call routers with state information related to
agents, calls, queues, and so forth, at the respective call center sites. This type of PG-to-Central
Controller traffic is real-time traffic. The PGs also send up historical data each half hour on the half hour.
The historical data is low-priority, but it must complete its journey to the central site within the half hour
(to get ready for the next half hour of data).

When a PG starts, its configuration data is supplied from the central site so that it can know which
agents, trunks, and so forth, it has to monitor. This configuration download can be a significant network
bandwidth transient.

IPT Cluster

Unified CM Cluster

RSVP Agent

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