Advantages Over Redundancy - Mitel 3300 General Information Manual

3300 ICP General Information Guide
• ACD Resiliency - In Release 7.0 and later, ACD Agent calls and ACD Agent groups are
resilient.
• Hunt group resiliency - In Release 7.0 and later, resiliency is supported for voice, voice
mail, or recorder hunt groups. The 3300 ICP supports only voice hunt groups. Currently,
only Nupoint Messenger Release 10.0 and later supports voice mail or recorder group hunt
group resiliency.
• A single point of provisioning - The Mitel system management tool, OPS Manager, is
used to provision resilient users and devices on primary and secondary 3300 ICPs. The
OPS Manager Moves, Adds and Changes workform populates 3300 call control forms with
resilient primary and secondary ICP Controller information. For more information on Resil-
iency, see the 3300 ICP Resiliency Guidelines.

Advantages Over Redundancy

Resiliency stands out from other more costly and less flexible solutions such as redundancy,
because it uses self-correction techniques that take advantage of the IP-network characteristics
of location independence and network element distribution. While the redundancy model is
highly effective and reliable, it can be an unnecessarily costly solution for some customers.
Distributed resilient networks offer the ability to route around failed or otherwise inaccessible
portions of an IP network. This feature provides the following distinct advantages over the
centralized 1+1 hardware requirements of a redundant solution:
• No single point of failure
• Lower hardware costs because of the efficient use of existing hardware
Rather than dedicating expensive, robust hardware to solving temporary and often infrequent
system failures, Mitel Resiliency makes efficient use of a system's existing capacity. Since any
controller in the network can act as a secondary controller, Mitel Resiliency can be referred to
as an "any +1" solution for system reliability.
In resilient networks, a secondary controller is not limited to acting as a dedicated backup
call-control host. In many cases, the secondary controller can also function as any one of the
following:
• Group controller
• Wireless access controller
• Call center controller
• Video conference controller
ΙP network gateway
•
• PSTN gateway
• Voice mail server
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