6.3.1 Routing Configurations Overview

When using DM3 boards, two types of routing configuration are supported:

flexible routing configuration

This configuration is compatible with R4 API routing on Springware boards; that is, Springware boards use flexible routing. Flexible routing is available for DM3 boards became available in Intel® Dialogic System Release 5.01. With flexible routing, the resource devices (voice/fax) and network interface devices are independent, which allows exporting and sharing of the resources. All resources have access to the TDM bus. For example, on a DM/V960A-4T1 board, each voice resource channel device and each network interface time slot device can be independently routed on the TDM bus.

fixed routing configuration

This configuration is primarily for backward compatibility with R4 on DM3 in DNA 3.3 and Intel® Dialogic System Release 5.0. The fixed routing configuration applies only to DM3 boards. With fixed routing, the resource devices (voice/fax) and network interface devices are permanently coupled together in a fixed configuration. Only the network interface time slot device has access to the TDM bus. For example, on a DM/V960A-4T1 board, each voice resource channel device is permanently routed to a corresponding network interface time slot device on the same physical board. The routing of these resource and network interface devices is predefined and static. The resource device also does not have access to the TDM bus and so cannot be routed independently on the TDM bus. No off-board sharing or exporting of voice/fax resources is allowed.

The fixed routing configuration is one that uses permanently coupled resources, while the flexible routing configuration uses independent resources. From a DM3 perspective, the fixed routing cluster is restricted by its coupled resources and the flexible routing cluster allows more freedom by nature of its independent resources, as shown in Figure 29.

Figure 29. Cluster Configurations for Fixed and Flexible Routing

You select the routing configuration (fixed or flexible) when you assign a firmware file (PCD file) to each DM3 board. The routing configuration takes effect at board initialization.

The availability of flexible routing for a specific Intel® Dialogic product depends upon the software release in which the product is supported. Some products support fixed routing only while others support flexible routing only. In other cases, a choice of fixed or flexible routing is available.

You can only select the routing configuration at the product level. You cannot select the routing configuration at a resource level or configure a board to use fixed routing for some of its resources and flexible routing for other resources.

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