Cisco Cisco Unified Contact Center Enterprise 9.0(1) Guia Do Desenho
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Cisco Unified Contact Center Enterprise 7.0, 7.1, and 7.2 SRND
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Chapter 3 Design Considerations for High Availability
Understanding Failure Recovery
The Admin Site reduces the number of real-time feed clients the Unified ICM Call Router has to service
at a particular site. For remote sites, this is important because it can reduce the required bandwidth to
support remote Admin Workstations across a WAN connection.
at a particular site. For remote sites, this is important because it can reduce the required bandwidth to
support remote Admin Workstations across a WAN connection.
When using an Admin Site, the primary real-time distributor is the one that will register with the Unified
ICM Call Router for the real-time feed, and the other real-time distributors within that Admin Site
register with the primary real-time distributor for the real-time feed. If the primary real-time distributor
is down or does not accept the registration from the secondary real-time distributors, they will register
with the Unified ICM Call Router for the real-time feed. Client AWs that cannot register with the primary
or secondary real-time distributors will not be able to perform any Admin Workstation tasks until the
distributors are restored.
ICM Call Router for the real-time feed, and the other real-time distributors within that Admin Site
register with the primary real-time distributor for the real-time feed. If the primary real-time distributor
is down or does not accept the registration from the secondary real-time distributors, they will register
with the Unified ICM Call Router for the real-time feed. Client AWs that cannot register with the primary
or secondary real-time distributors will not be able to perform any Admin Workstation tasks until the
distributors are restored.
Alternatively, each real-time distributor could be deployed in its own Admin Site regardless of the
physical site of the device. This deployment will create more overhead for the Unified ICM Call Router
to maintain multiple real-time feed clients; however, it will prevent a failure of the primary real-time
distributor from taking down the secondary distributors at the site.
physical site of the device. This deployment will create more overhead for the Unified ICM Call Router
to maintain multiple real-time feed clients; however, it will prevent a failure of the primary real-time
distributor from taking down the secondary distributors at the site.
Additionally, if the Admin Workstation is being used to host the ConAPI interface for the Multi-Channel
Options (Cisco Email Manager Option and Cisco Collaboration Server Option), any configuration
changes made to the Unified ICM, Cisco Email Manager, or Cisco Collaboration Server systems will not
be passed over the ConAPI interface until it is restored.
Options (Cisco Email Manager Option and Cisco Collaboration Server Option), any configuration
changes made to the Unified ICM, Cisco Email Manager, or Cisco Collaboration Server systems will not
be passed over the ConAPI interface until it is restored.
CTI Server
The CTI Server monitors the data traffic of the Unified CM PIM on the Agent PG for specific CTI
messages (such as call ringing or off-hook events) and makes those messages available to CTI clients
such as the CTI OS Server or Cisco Agent Desktop Enterprise Server. It also processes third-party call
control messages (such as make call or answer call) from the CTI clients and sends those messages via
the PIM interface of the PG to Unified CM to process the event on behalf of the agent desktop.
messages (such as call ringing or off-hook events) and makes those messages available to CTI clients
such as the CTI OS Server or Cisco Agent Desktop Enterprise Server. It also processes third-party call
control messages (such as make call or answer call) from the CTI clients and sends those messages via
the PIM interface of the PG to Unified CM to process the event on behalf of the agent desktop.
CTI Server is redundant and co-resident on the Agent PG servers. (See
however, maintain agent state in the event of a failure. Upon failure of the CTI Server, the redundant CTI
server becomes active and begins processing call events. CTI OS Server is a client of the CTI Server and
is designed to monitor both CTI Servers in a duplex environment and maintain the agent state during
failover processing. CTI OS agents will see their desktop buttons gray-out during the failover to prevent
them from attempting to perform tasks while the CTI Server is down. The buttons will be restored as
soon as the redundant CTI Server is restored, and the agent does not have to log on again to the desktop
application.
server becomes active and begins processing call events. CTI OS Server is a client of the CTI Server and
is designed to monitor both CTI Servers in a duplex environment and maintain the agent state during
failover processing. CTI OS agents will see their desktop buttons gray-out during the failover to prevent
them from attempting to perform tasks while the CTI Server is down. The buttons will be restored as
soon as the redundant CTI Server is restored, and the agent does not have to log on again to the desktop
application.
The CTI Server is also critical to the operation of the Multi-Channel Options (Cisco Email Manager and
Cisco Content Server) as well as the Unified Outbound Option. If the CTI Server is down on both sides
of the duplex agent Peripheral Gateway pair, none of the agents for that Agent Peripheral Gateway will
be able to log into these applications.
Cisco Content Server) as well as the Unified Outbound Option. If the CTI Server is down on both sides
of the duplex agent Peripheral Gateway pair, none of the agents for that Agent Peripheral Gateway will
be able to log into these applications.