Cisco Cisco IP Contact Center Release 4.6.2 Design Guide

 

The Cisco MCS-7815 and MCS-7816 servers are not supported with Unified CCE deployments, but lab 
or demo setups can use these servers. They are, however, a supported Unified CM platform for 
Cisco Unified Communications deployments only. 

With Unified CM, you can choose from the following two redundancy schemes: 

2:1—For every two primary subscribers, there is one shared backup subscriber. 

1:1—For every primary subscriber, there is a backup subscriber. 

Due to the higher phone usage in contact centers and the increased downtime required during upgrades, 
the 2:1 redundancy scheme is not recommended for Unified CM deployments with Unified CCE.

 illustrates these two options. This illustration only shows call processing subscribers and 

does not show publisher, TFTP, music on hold (MoH), or other servers. For details on additional cluster 
deployment and redundancy options, refer to the latest version of the Cisco Unified Communications 
Solution Reference Network Design (SRND) Guide, available at 

In 

, the five options shown all provide 1:1 subscriber redundancy. Option 1 is used for 

clusters supporting fewer than 150 Unified CCE agents. Options 2 through 5 illustrate increasingly 
larger clusters. The exact number of servers will depend on the hardware platforms chosen or required, 
as determined by the Cisco Unified CM Capacity Tool or the Unified Communications Sizing Tool.

MCS-7825

100

MCS-7835 or MCS-7845

150

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