Cisco Cisco Unified Contact Center Enterprise 9.0(2) Prospecto
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Cisco Unified Contact Center Enterprise 7.5 SRND
Chapter 3 Design Considerations for High Availability
Unified CM and CTI Manager Design Considerations
user devices to conserve system resources in the Unified CM cluster. The other side of the Unified CM
PG stays in hot-standby mode, waiting to connect, log in, register, and be activated upon failure of the
active side.
PG stays in hot-standby mode, waiting to connect, log in, register, and be activated upon failure of the
active side.
shows two external CTI applications using the CTI Manager, the Agent PG, and the
Unified IP IVR. The Unified CM PG logs into the CTI Manager using the JTAPI account User 1, while
the Unified IP IVR uses account User 2. Each external application uses its own specific JTAPI user
account and will have different devices registered and monitored by that user. For example, the
Unified CM PG (User 1) will monitor all four agent phones and the inbound CTI Route Points, while the
Unified IP IVR (User 2) will monitor its CTI Ports and the CTI Route Points used for its JTAPI Triggers.
Although multiple applications could monitor the same devices, this method is not recommended
because it can cause race conditions between the applications trying to take control of the same physical
device.
the Unified IP IVR uses account User 2. Each external application uses its own specific JTAPI user
account and will have different devices registered and monitored by that user. For example, the
Unified CM PG (User 1) will monitor all four agent phones and the inbound CTI Route Points, while the
Unified IP IVR (User 2) will monitor its CTI Ports and the CTI Route Points used for its JTAPI Triggers.
Although multiple applications could monitor the same devices, this method is not recommended
because it can cause race conditions between the applications trying to take control of the same physical
device.
Figure 3-6
CTI Application Device Registration
Unified CM CTI applications also add to the device weights on the subscribers, adding memory objects
used to monitor registered devices. These monitors are registered on the subscriber that has the
connection to the external application. It is a good design practice to distribute these applications to CTI
Manager registrations across multiple subscribers to avoid overloading a single subscriber with all of
the monitored object tracking.
used to monitor registered devices. These monitors are registered on the subscriber that has the
connection to the external application. It is a good design practice to distribute these applications to CTI
Manager registrations across multiple subscribers to avoid overloading a single subscriber with all of
the monitored object tracking.
The design of Unified CM and CTI Manager should be performed as the second design stage, right after
the network design stage, and deployment should occur in this same order. The reason for this order is
that the Cisco Unified Communications infrastructure must be in place to dial and receive calls using its
devices before you can deploy any telephony applications. Before moving to the next design stage, make
sure that a PSTN phone can call an IP phone and that this same IP phone can dial out to a PSTN phone,
with all the call survivability capabilities considered for treating these calls. Also keep in mind that the
Unified CM cluster design is paramount to the Unified CCE system, and any server failure in a cluster
will take down two services (CTI Manager and CallManager), thereby adding an extra load to the
remaining servers in the cluster.
the network design stage, and deployment should occur in this same order. The reason for this order is
that the Cisco Unified Communications infrastructure must be in place to dial and receive calls using its
devices before you can deploy any telephony applications. Before moving to the next design stage, make
sure that a PSTN phone can call an IP phone and that this same IP phone can dial out to a PSTN phone,
with all the call survivability capabilities considered for treating these calls. Also keep in mind that the
Unified CM cluster design is paramount to the Unified CCE system, and any server failure in a cluster
will take down two services (CTI Manager and CallManager), thereby adding an extra load to the
remaining servers in the cluster.
ICM
PG
76605
Unified CM Publisher
(CTI Manager and
CallManager Services)
Unified CM Subscriber
(CTI Manager and
CallManager Services)
Unified CM Subscriber
(CTI Manager and
CallManager Services)
JTAPI user 1
logs in
Agent 1
IP IVR
IP
IP
JTAPI user 2 logs in
User 2 CTI ports
Agent 2
Agent 3
IP
IP
Agent 4