Cisco Cisco IPCC Web Option Design Guide

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Cisco Unified Contact Center Enterprise 7.0, 7.1, and 7.2 SRND
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Chapter 11      Sizing Cisco Unified Communications Manager Servers
Cisco Unified Mobile Agent
Step 4
Upgrade each backup server, one server at a time.
Note
Cisco does not recommend that you oversubscribe the backup server or servers during the 
upgrade. You should have no more than the maximum of 500 Unified CCE agents registered to 
the backup server during the upgrade. Perform the upgrade during off-peak hours when the call 
volume is low.
Step 5
Upgrade each primary server that has the Cisco CallManager service running on it. Remember to 
upgrade one server at a time. During the upgrade of the second primary subscriber, there will be some 
outage for users and agents subscribed on that server, until the server is upgraded. Similarly, when you 
upgrade the fourth primary subscriber, there will be some outage for users and agents subscribed on that 
server, until the server is upgraded.
Cisco Unified Mobile Agent
Cisco Unified CCE 7.1 added a new feature called Cisco Unified Mobile Agent. Unified Mobile Agent 
requires the use of two CTI ports per contact center call.   One CTI port controls the caller endpoint, and 
the other CTI port controls the selected agent endpoint. The actual RTP stream is between the two 
endpoints and is not bridged through these two CTI ports. However, there is additional call processing 
activity on Unified CM when setting up calls to mobile agents via these two CTI ports (when compared 
with setting up calls to local Unified CCE agents).
While mobile agents may essentially log in from any location (via the agent desktop) where they have a 
high-quality broadband connection and a PSTN phone, they will still be associated logically with a 
particular Unified CCE Peripheral and Unified CM cluster, even if the voice gateway used to call the 
mobile agent is registered with a different Unified CM cluster.   The agent desktop is configured with 
the IP address of the PG and/or CTI server to which it is associated.
For specific Unified CM node and cluster sizing for Unified CCE deployments, the Cisco Unified CM 
Capacity Tool or the Unified Communications Sizing Tool must be used. When sizing the Unified CM 
cluster, input the maximum number of simultaneously logged-in mobile agents.
For more details on Cisco Unified Mobile Agent architecture, deployment models, and Unified CCE 
sizing, see the chapter on 
.