Mitel 5560 IPT none Specifications download pdf (Page 30)

Engineering Guidelines

Typical Installation Configurations

The MiVoice Business platorm can be designed into different network configurations to suit the

organization of the enterprise. See the following examples for an illustration of how the

organization of the enterprise affects the overall network and unit configurations:

• “Multiple Units System” on page 16

• “Distributed System” on page 16

• “Hybrid System” on page 18

In the descriptions below, a unit is considered to be a 3300 ICP with a particular configuration

and is part of the overall telephony system.

Multiple Units System

In a multiple unit configuration, a number of units are clustered together, but each unit functions

independently. The units connect to each other through the network, using IP trunks or TDM

trunks. In the event of a unit failure, some of the overall system will fail. In the event of a network

failure, the units still maintain PSTN access. In a small- or medium-sized office, a number of

units could be installed together to make a larger system. Another scenario could be a small-

or medium-sized business with a number of branch offices (for example, an automobile

dealership), where local access is needed, but intershop traffic is also a requirement.

Figure 2: Example of a Multiple Units Configuration

Distributed System

In a distributed system, different telephony system functions are dedicated to individual units.

These are then distributed to different parts of the network, or business as required. This may

be a large and geographically dispersed enterprise. For example, a number of units could act

purely as TDM gateways providing central access, with other units acting as central voice mail

and others acting as the group controllers (a group controller is a 3300 ICP to which a group

of IP phones have been registered). An example is a university campus where each building

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Mitel 5560 IPT none Specifications Page 30